{
  "schema": "odl_public_task_structure_v1",
  "timebase": "public_preview_seconds",
  "annotation_method": "manual single-annotator review",
  "task": "food preparation with handheld knife and produce",
  "segments": [
    {
      "start_s": 0.0,
      "end_s": 5.4,
      "label": "onion trimming and surface preparation",
      "objects": [
        "onion",
        "knife",
        "cutting board"
      ],
      "interaction": "bimanual tool use"
    },
    {
      "start_s": 5.4,
      "end_s": 7.0,
      "label": "place prepared onion and reach for next item",
      "objects": [
        "onion",
        "knife"
      ],
      "interaction": "object placement and reach"
    },
    {
      "start_s": 7.0,
      "end_s": 15.8,
      "label": "second onion trimming and peeling",
      "objects": [
        "onion",
        "knife"
      ],
      "interaction": "bimanual tool use and peel removal"
    },
    {
      "start_s": 15.8,
      "end_s": 17.8,
      "label": "set onion aside and transition to next item",
      "objects": [
        "onion",
        "knife",
        "sweet potato"
      ],
      "interaction": "object transition"
    },
    {
      "start_s": 17.8,
      "end_s": 19.55,
      "label": "begin trimming sweet potato",
      "objects": [
        "sweet potato",
        "knife"
      ],
      "interaction": "bimanual tool use"
    }
  ],
  "boundary_note": "Manual approximate semantic boundaries; not frame-accurate ground truth."
}