{
  "session_id": "session_data_20260406_154725",
  "total_duration_s": 1703.3,
  "n_input_spans": 146,
  "session_goal": "Sew green patterned fabric pieces, attach white trim, cut silver fabric, and sew blue embroidered fabric on sewing machine.",
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          "description": "Arrange green patterned fabric pieces and sew them with sewing machine.",
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          "description": "Arrange multiple green fabric pieces and sew them together.",
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          "description": "Position green fabric under presser foot and sew.",
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          "description": "Align, sew, and move green patterned fabric pieces.",
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          "description": "Arrange, inspect, and sew green fabric piece, then move aside.",
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        {
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          "description": "Sort, arrange, and sew multiple green patterned fabric pieces.",
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      ]
    },
    {
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      "description": "Thread sewing machine and sew small green patterned fabric pieces.",
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          "episode_id": 10,
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          "description": "Thread sewing machine, adjust components, and align green fabric.",
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          "description": "Align, position, and sew small green patterned fabric pieces.",
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      ]
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    {
      "sub_goal_id": 3,
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      "description": "Sew large green patterned fabric pieces and reposition them.",
      "episodes": [
        {
          "episode_id": 12,
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          "description": "Align large green fabric pieces, adjust settings, and sew them.",
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        },
        {
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          "description": "Sort remaining green fabric pieces, arrange, and sew them.",
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        },
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          "description": "Reposition green fabric, sew, and separate sewn pieces.",
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          "description": "Position green fabric, sew, reposition, and remove from machine.",
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      ]
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    {
      "sub_goal_id": 4,
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      "description": "Attach white trim to green fabric and arrange sewn pieces.",
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        {
          "episode_id": 16,
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          "end_time": 855.0,
          "description": "Align and sew white trim onto green fabric with sewing machine.",
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        },
        {
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          "description": "Position new green fabric, sew, and arrange sewn pieces.",
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      ]
    },
    {
      "sub_goal_id": 5,
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      "end_time": 924.0,
      "description": "Pick fabric scraps from floor and cut silver fabric with scissors.",
      "episodes": [
        {
          "episode_id": 18,
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          "end_time": 890.0,
          "description": "Pick up fabric scraps from floor and place on worktable.",
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        },
        {
          "episode_id": 19,
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          "description": "Position silver fabric piece and cut with scissors.",
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        }
      ]
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    {
      "sub_goal_id": 6,
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      "description": "Sew and cut green patterned fabric into sections repeatedly.",
      "episodes": [
        {
          "episode_id": 20,
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          "description": "Sew green patterned fabric and cut with scissors repeatedly.",
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        },
        {
          "episode_id": 21,
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          "description": "Inspect green patterned fabric, adjust, and cut thread.",
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          ]
        },
        {
          "episode_id": 22,
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          "end_time": 1314.0,
          "description": "Sew green fabric, align small strip, sew strip to main fabric.",
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          ]
        },
        {
          "episode_id": 23,
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          "description": "Rearrange green patterned fabric sections and sew.",
          "span_indices": [
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        },
        {
          "episode_id": 24,
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          "end_time": 1456.0,
          "description": "Adjust sections, sew, trim edge, and reposition under needle.",
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        },
        {
          "episode_id": 25,
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          "description": "Cut excess green fabric, align sections, and position for sewing.",
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        }
      ]
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    {
      "sub_goal_id": 7,
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      "description": "Examine and sew blue embroidered fabric with green patterned fabric.",
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        {
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          "description": "Position blue embroidered fabric under needle and sew.",
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          "description": "Reposition green patterned fabric under needle and sew.",
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        }
      ]
    }
  ]
}