{
 "model": "openai/gpt-6.1-sol",
 "reasoning_effort": "high",
 "sampling": "ego_head-every-0.5s",
 "labels": {
  "scene": {
   "objects": [
    {
     "name": "push broom",
     "attributes": [
      "long wooden handle",
      "rectangular wooden head",
      "blue bristles"
     ],
     "location": "held over the concrete path in front of the person"
    },
    {
     "name": "concrete garden path",
     "attributes": [
      "gray",
      "weathered",
      "cracked",
      "dusty"
     ],
     "location": "between the planting beds"
    },
    {
     "name": "loose dirt and grit",
     "attributes": [
      "small scattered particles",
      "gray-brown"
     ],
     "location": "on the concrete around the broom head"
    },
    {
     "name": "garden beds",
     "attributes": [
      "exposed soil",
      "low green plants",
      "weeds",
      "small yellow flowers"
     ],
     "location": "along both sides of the path"
    },
    {
     "name": "dark garden edging",
     "attributes": [
      "low",
      "irregular sections"
     ],
     "location": "between the soil beds and concrete"
    },
    {
     "name": "translucent plastic sheet",
     "attributes": [
      "pale",
      "wrinkled"
     ],
     "location": "beside the path at the lower right near the end"
    },
    {
     "name": "terracotta fragments",
     "attributes": [
      "orange-brown",
      "irregular"
     ],
     "location": "on the plastic sheet beside the path"
    }
   ],
   "setting": "An outdoor garden walkway bordered by soil beds and low vegetation, in strong sunlight."
  },
  "timeline": [
   {
    "start_s": 0.0,
    "end_s": 0.5,
    "arm": "both",
    "action": "sweep broom across concrete",
    "object": "push broom",
    "destination": "dusty path",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.05,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots",
    "notes": "Already gripping the broom at the start. Short-stroke boundaries are estimated from the sampled frames."
   },
   {
    "start_s": 0.5,
    "end_s": 1.0,
    "arm": "both",
    "action": "reverse sweeping stroke",
    "object": "push broom",
    "destination": "same patch of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.06,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 1.0,
    "end_s": 2.0,
    "arm": "both",
    "action": "sweep across dusty patch",
    "object": "push broom",
    "destination": "path ahead",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.07,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 2.0,
    "end_s": 3.0,
    "arm": "both",
    "action": "draw broom back across patch",
    "object": "push broom",
    "destination": "same patch of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.08,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 3.0,
    "end_s": 3.5,
    "arm": "both",
    "action": "sweep across path",
    "object": "push broom",
    "destination": "path ahead",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.09,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 3.5,
    "end_s": 4.0,
    "arm": "both",
    "action": "reverse sweeping stroke",
    "object": "push broom",
    "destination": "same patch of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.1,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 4.0,
    "end_s": 5.0,
    "arm": "both",
    "action": "sweep broom across grit",
    "object": "push broom",
    "destination": "dusty path",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.11,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 5.0,
    "end_s": 6.0,
    "arm": "both",
    "action": "draw broom back over path",
    "object": "push broom",
    "destination": "nearby strip of concrete",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.12,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 6.0,
    "end_s": 7.0,
    "arm": "both",
    "action": "sweep neighboring strip",
    "object": "push broom",
    "destination": "path near planting-bed edge",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.14,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 7.0,
    "end_s": 8.0,
    "arm": "both",
    "action": "reverse sweep over strip",
    "object": "push broom",
    "destination": "same strip of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.15,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 8.0,
    "end_s": 9.0,
    "arm": "both",
    "action": "sweep across surface dirt",
    "object": "push broom",
    "destination": "path ahead",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.16,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 9.0,
    "end_s": 10.0,
    "arm": "both",
    "action": "draw broom back across path",
    "object": "push broom",
    "destination": "same working area",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.17,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 10.0,
    "end_s": 11.0,
    "arm": "both",
    "action": "sweep another strip",
    "object": "push broom",
    "destination": "adjacent concrete",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.18,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 11.0,
    "end_s": 11.5,
    "arm": "both",
    "action": "reverse sweeping stroke",
    "object": "push broom",
    "destination": "same working area",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.19,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 11.5,
    "end_s": 12.0,
    "arm": "both",
    "action": "guide broom farther along walkway",
    "object": "push broom",
    "destination": "next working patch",
    "spatial_relation": "ahead along path",
    "contribution": "advancing",
    "progress": 0.2,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 12.0,
    "end_s": 13.0,
    "arm": "both",
    "action": "sweep across next patch",
    "object": "push broom",
    "destination": "dusty concrete",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.22,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 13.0,
    "end_s": 14.0,
    "arm": "both",
    "action": "reverse sweep across patch",
    "object": "push broom",
    "destination": "same patch of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.23,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 14.0,
    "end_s": 15.0,
    "arm": "both",
    "action": "sweep broom across path",
    "object": "push broom",
    "destination": "concrete near bed edge",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.24,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 15.0,
    "end_s": 15.5,
    "arm": "both",
    "action": "draw broom back",
    "object": "push broom",
    "destination": "same working patch",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.25,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 15.5,
    "end_s": 16.5,
    "arm": "both",
    "action": "sweep across gritty surface",
    "object": "push broom",
    "destination": "path ahead",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.26,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 16.5,
    "end_s": 17.5,
    "arm": "both",
    "action": "reverse sweeping stroke",
    "object": "push broom",
    "destination": "same patch of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.27,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 17.5,
    "end_s": 18.5,
    "arm": "both",
    "action": "sweep neighboring strip",
    "object": "push broom",
    "destination": "adjacent concrete",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.28,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 18.5,
    "end_s": 19.5,
    "arm": "both",
    "action": "draw broom back over strip",
    "object": "push broom",
    "destination": "same strip of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.3,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 19.5,
    "end_s": 20.5,
    "arm": "both",
    "action": "sweep across surface dirt",
    "object": "push broom",
    "destination": "path ahead",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.31,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 20.5,
    "end_s": 21.5,
    "arm": "both",
    "action": "reverse sweep across concrete",
    "object": "push broom",
    "destination": "same working area",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.32,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 21.5,
    "end_s": 22.5,
    "arm": "both",
    "action": "sweep broom over next strip",
    "object": "push broom",
    "destination": "nearby path surface",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.33,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 22.5,
    "end_s": 23.5,
    "arm": "both",
    "action": "draw broom back across strip",
    "object": "push broom",
    "destination": "same strip of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.35,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 23.5,
    "end_s": 24.5,
    "arm": "both",
    "action": "sweep across gritty patch",
    "object": "push broom",
    "destination": "concrete ahead",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.36,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 24.5,
    "end_s": 25.5,
    "arm": "both",
    "action": "reverse sweeping stroke",
    "object": "push broom",
    "destination": "same patch of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.37,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 25.5,
    "end_s": 26.5,
    "arm": "both",
    "action": "sweep broom across path",
    "object": "push broom",
    "destination": "adjacent concrete",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.38,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 26.5,
    "end_s": 27.5,
    "arm": "both",
    "action": "draw broom back over concrete",
    "object": "push broom",
    "destination": "same working area",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.4,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 27.5,
    "end_s": 28.5,
    "arm": "both",
    "action": "sweep next strip of path",
    "object": "push broom",
    "destination": "path ahead",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.41,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 28.5,
    "end_s": 29.5,
    "arm": "both",
    "action": "reverse sweep across strip",
    "object": "push broom",
    "destination": "same strip of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.42,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 29.5,
    "end_s": 30.5,
    "arm": "both",
    "action": "sweep neighboring patch",
    "object": "push broom",
    "destination": "concrete near garden edge",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.44,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 30.5,
    "end_s": 31.5,
    "arm": "both",
    "action": "draw broom back across patch",
    "object": "push broom",
    "destination": "same patch of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.45,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 31.5,
    "end_s": 32.5,
    "arm": "both",
    "action": "sweep across dusty concrete",
    "object": "push broom",
    "destination": "path ahead",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.46,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 32.5,
    "end_s": 33.5,
    "arm": "both",
    "action": "reverse sweeping stroke",
    "object": "push broom",
    "destination": "same working area",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.48,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 33.5,
    "end_s": 34.5,
    "arm": "both",
    "action": "sweep another strip",
    "object": "push broom",
    "destination": "adjacent path surface",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.49,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 34.5,
    "end_s": 35.5,
    "arm": "both",
    "action": "draw broom back over strip",
    "object": "push broom",
    "destination": "same strip of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.5,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 35.5,
    "end_s": 36.5,
    "arm": "both",
    "action": "sweep across grit",
    "object": "push broom",
    "destination": "concrete ahead",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.51,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 36.5,
    "end_s": 37.5,
    "arm": "both",
    "action": "reverse sweep across concrete",
    "object": "push broom",
    "destination": "same working patch",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.53,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 37.5,
    "end_s": 38.5,
    "arm": "both",
    "action": "sweep neighboring strip",
    "object": "push broom",
    "destination": "nearby path surface",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.54,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 38.5,
    "end_s": 39.5,
    "arm": "both",
    "action": "draw broom back across path",
    "object": "push broom",
    "destination": "same strip of concrete",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.55,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 39.5,
    "end_s": 40.5,
    "arm": "both",
    "action": "sweep across dusty patch",
    "object": "push broom",
    "destination": "path ahead",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.56,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 40.5,
    "end_s": 41.5,
    "arm": "both",
    "action": "reverse sweeping stroke",
    "object": "push broom",
    "destination": "same patch of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.58,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 41.5,
    "end_s": 42.5,
    "arm": "both",
    "action": "sweep broom across concrete",
    "object": "push broom",
    "destination": "nearby strip of path",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.59,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 42.5,
    "end_s": 43.5,
    "arm": "both",
    "action": "draw broom back toward stance",
    "object": "push broom",
    "destination": "path in front of feet",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.6,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 43.5,
    "end_s": 44.0,
    "arm": "both",
    "action": "raise broom for reorientation",
    "object": "push broom",
    "destination": "in front of body",
    "spatial_relation": "above path",
    "contribution": "advancing",
    "progress": 0.61,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots",
    "notes": "The head's brief clearance is inferred from the turn between sampled frames."
   },
   {
    "start_s": 44.0,
    "end_s": 44.5,
    "arm": "both",
    "action": "pivot broom to opposite working angle",
    "object": "push broom",
    "destination": "neighboring patch of path",
    "spatial_relation": "across front of body",
    "contribution": "advancing",
    "progress": 0.62,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 44.0,
    "end_s": 44.5,
    "arm": "both",
    "action": "adjust hand spacing on shaft",
    "object": "push broom handle",
    "destination": null,
    "spatial_relation": "hands along wooden shaft",
    "contribution": "advancing",
    "progress": 0.62,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots",
    "notes": "Grip adjustment occurs during the turn; the individual sliding order is not resolved."
   },
   {
    "start_s": 44.5,
    "end_s": 45.0,
    "arm": "both",
    "action": "lower broom into working position",
    "object": "push broom",
    "destination": "adjacent concrete patch",
    "spatial_relation": "bristles onto path",
    "contribution": "advancing",
    "progress": 0.63,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 45.0,
    "end_s": 46.0,
    "arm": "both",
    "action": "sweep at the new angle",
    "object": "push broom",
    "destination": "path near soil edge",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.65,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 46.0,
    "end_s": 46.5,
    "arm": "both",
    "action": "draw broom back across patch",
    "object": "push broom",
    "destination": "same working patch",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.66,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 46.5,
    "end_s": 47.0,
    "arm": "both",
    "action": "sweep outward across concrete",
    "object": "push broom",
    "destination": "path ahead",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.67,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 47.0,
    "end_s": 47.5,
    "arm": "both",
    "action": "reverse sweeping stroke",
    "object": "push broom",
    "destination": "same patch of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.68,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 47.5,
    "end_s": 48.0,
    "arm": "both",
    "action": "sweep across surface dirt",
    "object": "push broom",
    "destination": "adjacent concrete",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.69,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 48.0,
    "end_s": 48.5,
    "arm": "both",
    "action": "draw broom back",
    "object": "push broom",
    "destination": "same working patch",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.7,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 48.5,
    "end_s": 49.0,
    "arm": "both",
    "action": "sweep outward across path",
    "object": "push broom",
    "destination": "path ahead",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.71,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 49.0,
    "end_s": 49.5,
    "arm": "both",
    "action": "reverse sweeping stroke",
    "object": "push broom",
    "destination": "same patch of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.72,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 49.5,
    "end_s": 50.0,
    "arm": "both",
    "action": "sweep across neighboring strip",
    "object": "push broom",
    "destination": "nearby concrete",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.73,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 50.0,
    "end_s": 50.5,
    "arm": "both",
    "action": "turn broom back across body",
    "object": "push broom",
    "destination": "next working position",
    "spatial_relation": "shaft across front of torso",
    "contribution": "advancing",
    "progress": 0.74,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 50.0,
    "end_s": 50.5,
    "arm": "left",
    "action": "release broom shaft",
    "object": "push broom handle",
    "destination": null,
    "spatial_relation": "hand separates from shaft",
    "contribution": "advancing",
    "progress": 0.74,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots",
    "notes": "Release is inferred between samples; the left glove is lowered and free afterward while the right supports the broom."
   },
   {
    "start_s": 50.5,
    "end_s": 51.5,
    "arm": "right",
    "action": "guide broom into new position",
    "object": "push broom",
    "destination": "path ahead",
    "spatial_relation": "held across body",
    "contribution": "advancing",
    "progress": 0.75,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 51.5,
    "end_s": 52.0,
    "arm": "left",
    "action": "reach toward forward shaft",
    "object": "push broom handle",
    "destination": "shaft ahead of right hand",
    "spatial_relation": "hand approaching handle",
    "contribution": "advancing",
    "progress": 0.76,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 52.0,
    "end_s": 52.5,
    "arm": "left",
    "action": "grasp broom shaft",
    "object": "push broom handle",
    "destination": null,
    "spatial_relation": "left hand around forward shaft",
    "contribution": "advancing",
    "progress": 0.77,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 52.5,
    "end_s": 53.5,
    "arm": "both",
    "action": "resume sweep across path",
    "object": "push broom",
    "destination": "concrete ahead",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.79,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 53.5,
    "end_s": 54.5,
    "arm": "both",
    "action": "reverse sweeping stroke",
    "object": "push broom",
    "destination": "same working patch",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.8,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 54.5,
    "end_s": 55.5,
    "arm": "both",
    "action": "sweep across gritty surface",
    "object": "push broom",
    "destination": "neighboring path strip",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.81,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 55.5,
    "end_s": 56.5,
    "arm": "both",
    "action": "draw broom back across strip",
    "object": "push broom",
    "destination": "same strip of path",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.82,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 56.5,
    "end_s": 57.5,
    "arm": "both",
    "action": "sweep another patch",
    "object": "push broom",
    "destination": "path ahead",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.83,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 57.5,
    "end_s": 58.5,
    "arm": "both",
    "action": "reverse sweep across patch",
    "object": "push broom",
    "destination": "same working area",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.84,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 58.5,
    "end_s": 59.0,
    "arm": "both",
    "action": "sweep broom across concrete",
    "object": "push broom",
    "destination": "path near plastic sheet",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.85,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 59.0,
    "end_s": 59.5,
    "arm": "both",
    "action": "draw broom back across path",
    "object": "push broom",
    "destination": "same patch of concrete",
    "spatial_relation": "across concrete",
    "contribution": "advancing",
    "progress": 0.86,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots"
   },
   {
    "start_s": 59.5,
    "end_s": 59.97,
    "arm": "both",
    "action": "continue sweeping ahead",
    "object": "push broom",
    "destination": "dusty path",
    "spatial_relation": "bristles against concrete",
    "contribution": "advancing",
    "progress": 0.87,
    "hands_visible": true,
    "hands_wearing": "white knit work gloves with blue grip dots",
    "notes": "Sweeping remains underway at the recording boundary."
   }
  ],
  "task_summary": "The person uses a long-handled push broom to sweep loose dirt and grit along a concrete garden path, changing working angle and grip as they move.",
  "viewpoint": "first_person",
  "key_events": [
   {
    "t_s": 0.0,
    "label": "Sweeping is already underway with both hands holding the broom",
    "kind": "contact",
    "outcome": "success"
   },
   {
    "t_s": 12.0,
    "label": "The broom is advanced along the walkway to another working patch",
    "kind": "phase",
    "outcome": "success"
   },
   {
    "t_s": 45.0,
    "label": "Sweeping resumes after turning the broom to a different working angle",
    "kind": "phase",
    "outcome": "success"
   },
   {
    "t_s": 52.5,
    "label": "The left hand regrips the shaft and two-handed sweeping resumes",
    "kind": "contact",
    "outcome": "success"
   },
   {
    "t_s": 59.97,
    "label": "Sweeping continues without a visible completion of the path cleaning",
    "kind": "phase",
    "outcome": "unclear",
    "note": "The continuous recording window ends while the broom is still being worked over the path."
   }
  ],
  "state_changes": [
   {
    "t_s": 50.5,
    "object": "push broom",
    "from": "held by both hands",
    "to": "supported by the right hand while the left hand is free"
   },
   {
    "t_s": 52.5,
    "object": "push broom",
    "from": "supported by the right hand",
    "to": "held by both hands again"
   }
  ],
  "tasks": [
   {
    "start_s": 0.0,
    "end_s": 59.97,
    "task": "Sweep loose dirt and grit from the concrete garden path",
    "objects": [
     "push broom",
     "loose dirt and grit",
     "concrete garden path"
    ],
    "outcome": "unclear",
    "success_predicate": "The intended stretch of path is cleared of loose surface debris and the sweeping of that stretch is finished.",
    "completed_at_s": null,
    "note": "Useful sweeping is visible throughout, but the activity is underway at both boundaries and the footage does not establish its final extent or completion."
   }
  ],
  "scene_graph": [
   {
    "t_s": 0.0,
    "relations": [
     "left hand holding forward broom shaft",
     "right hand holding rear broom shaft",
     "broom bristles contacting concrete path",
     "loose dirt and grit on concrete path",
     "concrete path between garden beds",
     "dark garden edging bordering concrete path"
    ]
   },
   {
    "t_s": 12.0,
    "relations": [
     "both hands holding broom shaft",
     "broom head contacting next working patch",
     "garden soil beside concrete path",
     "low vegetation growing along path edge"
    ]
   },
   {
    "t_s": 45.0,
    "relations": [
     "both hands holding reoriented broom shaft",
     "broom head on concrete near soil edge",
     "person standing beside working patch",
     "loose grit on path around broom"
    ]
   },
   {
    "t_s": 52.5,
    "relations": [
     "left hand holding forward broom shaft",
     "right hand holding rear broom shaft",
     "broom head contacting concrete path"
    ]
   },
   {
    "t_s": 59.97,
    "relations": [
     "both hands holding broom shaft",
     "broom bristles contacting concrete path",
     "loose grit on concrete ahead of broom",
     "garden bed beside concrete path",
     "terracotta fragments on translucent plastic sheet",
     "translucent plastic sheet beside path"
    ]
   }
  ],
  "recovery": [],
  "instruction_variants": [
   "Sweep the loose dirt and grit from the garden walkway.",
   "Use the push broom to clean the concrete path between the garden beds.",
   "Work along the path, brushing the surface debris away with the broom."
  ],
  "performance_review": "The person works steadily with repeated short sweeps, shifting position and changing the broom angle to work neighboring patches. No drops, failed grasps, or obvious rework are visible; cleaning is still underway when the clip ends.",
  "data_issues": [],
  "operator_mistakes": []
 }
}