{
  "session_id": "session_data_20260404_220842",
  "total_duration_s": 1391.6,
  "n_input_spans": 113,
  "session_goal": "Sew blue embroidered fabric with blue trim, plain blue fabric, light blue embellished fabric, and plain turquoise fabric using sewing machine and scissors.",
  "sub_goals": [
    {
      "sub_goal_id": 1,
      "start_time": 0.0,
      "end_time": 250.0,
      "description": "Sew blue embroidered fabric with blue trim strip using sewing machine and scissors.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 0.0,
          "end_time": 77.0,
          "description": "Adjust sewing machine, sew blue embroidered fabric, and cut it with pink scissors.",
          "span_indices": [
            0,
            1,
            2,
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            4,
            5
          ]
        },
        {
          "episode_id": 2,
          "start_time": 77.0,
          "end_time": 171.0,
          "description": "Position and sew blue trim strip onto fabric, cut thread with red scissors.",
          "span_indices": [
            6,
            7,
            8,
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            10,
            11,
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            13,
            14
          ]
        },
        {
          "episode_id": 3,
          "start_time": 171.0,
          "end_time": 250.0,
          "description": "Sew second blue trim strip, cut thread, and move fabric aside.",
          "span_indices": [
            15,
            16,
            17,
            18,
            19,
            20,
            21
          ]
        }
      ]
    },
    {
      "sub_goal_id": 2,
      "start_time": 250.0,
      "end_time": 596.0,
      "description": "Sew plain blue fabric and cut and sew embroidered blue fabric pieces with scissors.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 250.0,
          "end_time": 328.0,
          "description": "Sew plain blue fabric with sewing machine and cut thread with red scissors.",
          "span_indices": [
            22,
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            25,
            26,
            27,
            28,
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            35
          ]
        },
        {
          "episode_id": 2,
          "start_time": 328.0,
          "end_time": 410.0,
          "description": "Sew first and second sections of embroidered blue fabric, cut thread with scissors.",
          "span_indices": [
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            43
          ]
        },
        {
          "episode_id": 3,
          "start_time": 410.0,
          "end_time": 596.0,
          "description": "Thread needle, cut embroidered fabric into pieces with pink scissors, and fold on table.",
          "span_indices": [
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            49,
            50,
            51,
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            53
          ]
        }
      ]
    },
    {
      "sub_goal_id": 3,
      "start_time": 596.0,
      "end_time": 900.0,
      "description": "Sew light blue embellished fabric and combine with plain turquoise fabric using sewing machine.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 596.0,
          "end_time": 644.0,
          "description": "Unfold and cut light blue embellished fabric, sew first piece with sewing machine.",
          "span_indices": [
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            58,
            59,
            60
          ]
        },
        {
          "episode_id": 2,
          "start_time": 644.0,
          "end_time": 780.0,
          "description": "Prepare sewing machine, thread needle, test sew, and adjust bobbin for light blue fabric.",
          "span_indices": [
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            69
          ]
        },
        {
          "episode_id": 3,
          "start_time": 780.0,
          "end_time": 867.0,
          "description": "Examine pink-rimmed glasses, adjust machine, sew light blue fabric, and arrange pieces.",
          "span_indices": [
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            74,
            75,
            76,
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            78,
            79
          ]
        },
        {
          "episode_id": 4,
          "start_time": 867.0,
          "end_time": 900.0,
          "description": "Align light blue embellished fabric with plain turquoise fabric and sew combined.",
          "span_indices": [
            80,
            81,
            82
          ]
        }
      ]
    },
    {
      "sub_goal_id": 4,
      "start_time": 900.0,
      "end_time": 1391.6,
      "description": "Sew and trim blue embroidered fabric sections with sewing machine and pink scissors.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 900.0,
          "end_time": 1059.7,
          "description": "Sew blue embroidered fabric, cut thread and excess fabric with pink scissors, arrange pieces.",
          "span_indices": [
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          ]
        },
        {
          "episode_id": 2,
          "start_time": 1059.7,
          "end_time": 1163.6,
          "description": "Position and sew blue embroidered fabric, cut thread, and move sewn fabric aside.",
          "span_indices": [
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          ]
        },
        {
          "episode_id": 3,
          "start_time": 1163.6,
          "end_time": 1291.2,
          "description": "Trim edges of blue embroidered fabric, sew, and cut thread with pink scissors.",
          "span_indices": [
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            105
          ]
        },
        {
          "episode_id": 4,
          "start_time": 1291.2,
          "end_time": 1391.6,
          "description": "Align two blue fabric pieces, sew, cut excess, inspect seam, and position new fabric.",
          "span_indices": [
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            111,
            112
          ]
        }
      ]
    }
  ]
}