{
 "schema_version": 1,
 "source": "vendor annotation.json (schema 2, revision 1)",
 "time_reference": "start_s / end_s: seconds from the start of the segment video, [start, end); t_start / t_end: the same bounds on the session time base (meta.json time_base, t = 0 at the first solved Body0 frame) = start_s + video_t_start",
 "primitive": "P35",
 "instruction": "March in place at a comfortable rhythm without moving forward; stop.",
 "segments": [
  {
   "id": "segment1",
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   "video": "left_eye",
   "video_t_start": 0.04050181464295888
  }
 ],
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   "instruction": "March in place at a comfortable rhythm without moving forward; stop."
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   "instruction": "March in place at a comfortable rhythm without moving forward; stop."
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   "instruction": "March in place at a comfortable rhythm without moving forward; stop."
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  {
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   "instruction": "March in place at a comfortable rhythm without moving forward; stop."
  }
 ]
}