{
  "session_id": "session_data_20260408_133439",
  "total_duration_s": 847.9,
  "n_input_spans": 87,
  "session_goal": "Sew patterned fabric, red paisley fabric, and a red patterned garment using a sewing machine and scissors.",
  "sub_goals": [
    {
      "sub_goal_id": 1,
      "start_time": 0.0,
      "end_time": 300.0,
      "description": "Sew patterned fabric with sewing machine and cut threads with scissors.",
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        {
          "episode_id": 1,
          "start_time": 0.0,
          "end_time": 165.0,
          "description": "Observe sewing workspace and sew patterned fabric with sewing machine.",
          "span_indices": [
            0,
            1,
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          ]
        },
        {
          "episode_id": 2,
          "start_time": 165.0,
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          "description": "Cut threads and adjust patterned fabric for subsequent sewing.",
          "span_indices": [
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          ]
        }
      ]
    },
    {
      "sub_goal_id": 2,
      "start_time": 300.0,
      "end_time": 533.0,
      "description": "Sew and reposition red paisley fabric, cut threads with small scissors.",
      "episodes": [
        {
          "episode_id": 3,
          "start_time": 300.0,
          "end_time": 374.7,
          "description": "Position and sew red paisley fabric, inspect seam, and cut threads.",
          "span_indices": [
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          ]
        },
        {
          "episode_id": 4,
          "start_time": 374.7,
          "end_time": 445.7,
          "description": "Continue sewing red paisley fabric, reposition and trim excess fabric.",
          "span_indices": [
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          ]
        },
        {
          "episode_id": 5,
          "start_time": 445.7,
          "end_time": 520.1,
          "description": "Flip and sew red paisley fabric repeatedly, cut threads with scissors.",
          "span_indices": [
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        },
        {
          "episode_id": 6,
          "start_time": 520.1,
          "end_time": 533.0,
          "description": "Final sewing of red paisley fabric and move it to side of table.",
          "span_indices": [
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          ]
        }
      ]
    },
    {
      "sub_goal_id": 3,
      "start_time": 533.0,
      "end_time": 600.0,
      "description": "Adjust sewing machine thread and sew red paisley fabric section.",
      "episodes": [
        {
          "episode_id": 7,
          "start_time": 533.0,
          "end_time": 554.5,
          "description": "Adjust sewing machine thread and position red paisley fabric section.",
          "span_indices": [
            43,
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          ]
        },
        {
          "episode_id": 8,
          "start_time": 554.5,
          "end_time": 600.0,
          "description": "Sew red paisley fabric section, cut threads, and inspect sewn garment.",
          "span_indices": [
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            50
          ]
        }
      ]
    },
    {
      "sub_goal_id": 4,
      "start_time": 600.0,
      "end_time": 847.9,
      "description": "Sew red patterned garment fabric and cut threads with red scissors.",
      "episodes": [
        {
          "episode_id": 9,
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          "end_time": 672.5,
          "description": "Position red patterned garment fabric, sew edges, and cut thread.",
          "span_indices": [
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          ]
        },
        {
          "episode_id": 10,
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          "end_time": 720.0,
          "description": "Reposition and sew red patterned garment fabric, inspect and adjust seams.",
          "span_indices": [
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          ]
        },
        {
          "episode_id": 11,
          "start_time": 720.0,
          "end_time": 762.0,
          "description": "Cut thread with red scissors, flip and sew garment fabric, inspect.",
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        },
        {
          "episode_id": 12,
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          "end_time": 847.9,
          "description": "Sew final seams, cut thread, and inspect finished red patterned garment.",
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        }
      ]
    }
  ]
}