{
  "session_id": "session_data_20260406_185844",
  "total_duration_s": 1459.8,
  "n_input_spans": 120,
  "session_goal": "Sew a yellow floral garment using sewing machine, cut strips with red scissors, and bind neckline with yellow binding strip.",
  "sub_goals": [
    {
      "sub_goal_id": 1,
      "start_time": 0.0,
      "end_time": 1459.8,
      "description": "Sew yellow floral fabric into a garment using sewing machine, red scissors, and yellow binding strip.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 0.0,
          "end_time": 62.0,
          "description": "Cut and sew yellow floral fabric strips on sewing table using sewing machine and red scissors.",
          "span_indices": [
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        {
          "episode_id": 2,
          "start_time": 62.0,
          "end_time": 275.0,
          "description": "Align and sew fabric strips to large yellow floral fabric, trim seam with yellow seam ripper.",
          "span_indices": [
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          ]
        },
        {
          "episode_id": 3,
          "start_time": 275.0,
          "end_time": 787.0,
          "description": "Sew main body seams of yellow floral garment, measure with measuring tape, and cut with red scissors.",
          "span_indices": [
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        },
        {
          "episode_id": 4,
          "start_time": 787.0,
          "end_time": 1015.0,
          "description": "Sew yellow binding strip onto neckline of yellow floral garment with sewing machine.",
          "span_indices": [
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          ]
        },
        {
          "episode_id": 5,
          "start_time": 1015.0,
          "end_time": 1181.0,
          "description": "Sew neckline and armhole edges and side seam of yellow floral garment, cut thread with red scissors.",
          "span_indices": [
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            80,
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          ]
        },
        {
          "episode_id": 6,
          "start_time": 1181.0,
          "end_time": 1459.8,
          "description": "Sew remaining edges of yellow floral garment, reposition, inspect, and cut excess threads with red scissors.",
          "span_indices": [
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        }
      ]
    }
  ]
}