{
  "session_id": "session_data_20260406_175633",
  "total_duration_s": 1401.6,
  "n_input_spans": 121,
  "session_goal": "Sew yellow floral fabric, cut and sew yellow patterned fabric, attach green trim, and fold final seams using sewing machine and scissors.",
  "sub_goals": [
    {
      "sub_goal_id": 1,
      "start_time": 0.0,
      "end_time": 525.0,
      "description": "Sew large and small yellow floral fabric pieces using sewing machine on work table.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 0.0,
          "end_time": 312.5,
          "description": "Sew first large piece of yellow floral fabric in multiple sections using sewing machine.",
          "span_indices": [
            0,
            1,
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            6,
            7,
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            23,
            24
          ]
        },
        {
          "episode_id": 2,
          "start_time": 312.5,
          "end_time": 525.0,
          "description": "Sew many small yellow floral fabric pieces with repeated adjusting and cutting on sewing table.",
          "span_indices": [
            25,
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            30,
            31,
            32,
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            63
          ]
        }
      ]
    },
    {
      "sub_goal_id": 2,
      "start_time": 525.0,
      "end_time": 816.8,
      "description": "Cut yellow patterned fabric with scissors, arrange pieces, and sew them with sewing machine.",
      "episodes": [
        {
          "episode_id": 3,
          "start_time": 525.0,
          "end_time": 608.5,
          "description": "Cut yellow floral fabric with scissors, remove pieces from plastic bag, and arrange on work table.",
          "span_indices": [
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            69,
            70
          ]
        },
        {
          "episode_id": 4,
          "start_time": 608.5,
          "end_time": 816.8,
          "description": "Sew small yellow patterned fabric pieces together with sewing machine, cutting thread between cycles.",
          "span_indices": [
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            89,
            90,
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            92,
            93,
            94,
            95,
            96
          ]
        }
      ]
    },
    {
      "sub_goal_id": 3,
      "start_time": 816.8,
      "end_time": 1312.9,
      "description": "Cut green fabric into strips, sew trim onto yellow fabric, and sew final seams on strip.",
      "episodes": [
        {
          "episode_id": 5,
          "start_time": 816.8,
          "end_time": 882.8,
          "description": "Cut green fabric into strips with scissors for trim.",
          "span_indices": [
            97
          ]
        },
        {
          "episode_id": 6,
          "start_time": 882.8,
          "end_time": 1197.0,
          "description": "Sew green trim onto yellow patterned fabric with sewing machine, aligning and cutting thread.",
          "span_indices": [
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            103,
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            112
          ]
        },
        {
          "episode_id": 7,
          "start_time": 1197.0,
          "end_time": 1312.9,
          "description": "Fold and align yellow fabric strip, sew first and second seams with sewing machine.",
          "span_indices": [
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            120
          ]
        }
      ]
    }
  ]
}