{
  "session_id": "session_data_20260404_181944",
  "total_duration_s": 575.9,
  "n_input_spans": 70,
  "session_goal": "Sew edges of blue embroidered fabric, cut fabric on patterned table and bed, iron fabric on bed, and sew fabric pieces together with sewing machine.",
  "sub_goals": [
    {
      "sub_goal_id": 1,
      "start_time": 0.0,
      "end_time": 290.0,
      "description": "Sew and trim edges of blue embroidered fabric using sewing machine and scissors.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 0.0,
          "end_time": 74.0,
          "description": "Set up sewing machine and sew first edge of blue embroidered fabric.",
          "span_indices": [
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            5,
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            7,
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          ]
        },
        {
          "episode_id": 2,
          "start_time": 74.0,
          "end_time": 128.0,
          "description": "Reposition, fold, and sew second edge of blue fabric, then cut thread.",
          "span_indices": [
            12,
            13,
            14,
            15,
            16,
            17,
            18,
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          ]
        },
        {
          "episode_id": 3,
          "start_time": 128.0,
          "end_time": 187.0,
          "description": "Carry blue fabric to patterned table, cut edge with scissors, and return to sewing table.",
          "span_indices": [
            22,
            23,
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            25,
            26
          ]
        },
        {
          "episode_id": 4,
          "start_time": 187.0,
          "end_time": 290.0,
          "description": "Fold, trim, and sew edge of blue fabric, then cut thread and remove.",
          "span_indices": [
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            30,
            31,
            32,
            33,
            34,
            35,
            36,
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          ]
        }
      ]
    },
    {
      "sub_goal_id": 2,
      "start_time": 290.0,
      "end_time": 360.0,
      "description": "Carry blue fabric to bed and iron it with iron.",
      "episodes": [
        {
          "episode_id": 5,
          "start_time": 290.0,
          "end_time": 301.0,
          "description": "Carry blue fabric to patterned table and adjust on bed.",
          "span_indices": [
            38,
            39
          ]
        },
        {
          "episode_id": 6,
          "start_time": 301.0,
          "end_time": 360.0,
          "description": "Get iron, iron blue fabric on bed, then return iron and unplug.",
          "span_indices": [
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            45
          ]
        }
      ]
    },
    {
      "sub_goal_id": 3,
      "start_time": 360.0,
      "end_time": 574.9,
      "description": "Cut blue fabric on bed and sew pieces together on sewing machine.",
      "episodes": [
        {
          "episode_id": 7,
          "start_time": 360.0,
          "end_time": 374.0,
          "description": "Cut blue fabric on bed with scissors.",
          "span_indices": [
            46,
            47
          ]
        },
        {
          "episode_id": 8,
          "start_time": 374.0,
          "end_time": 385.0,
          "description": "Carry cut fabric to sewing table and position.",
          "span_indices": [
            48,
            49
          ]
        },
        {
          "episode_id": 9,
          "start_time": 385.0,
          "end_time": 394.0,
          "description": "Pick up smaller blue fabric piece from floor and align with main fabric.",
          "span_indices": [
            50,
            51
          ]
        },
        {
          "episode_id": 10,
          "start_time": 394.0,
          "end_time": 479.0,
          "description": "Position fabric under needle and sew first section of blue fabric.",
          "span_indices": [
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            53,
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            55,
            56,
            57
          ]
        },
        {
          "episode_id": 11,
          "start_time": 479.0,
          "end_time": 513.0,
          "description": "Fold edge and sew next section of blue fabric, adjust seam.",
          "span_indices": [
            58,
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            60,
            61
          ]
        },
        {
          "episode_id": 12,
          "start_time": 513.0,
          "end_time": 547.0,
          "description": "Align next section under needle and sew blue fabric.",
          "span_indices": [
            62,
            63,
            64,
            65
          ]
        },
        {
          "episode_id": 13,
          "start_time": 547.0,
          "end_time": 566.0,
          "description": "Align final section and sew final section of blue fabric.",
          "span_indices": [
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          ]
        },
        {
          "episode_id": 14,
          "start_time": 566.0,
          "end_time": 574.9,
          "description": "Cut sewing thread with scissors and inspect sewn blue fabric.",
          "span_indices": [
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          ]
        }
      ]
    }
  ]
}