{
  "session_id": "session_data_20260405_102915",
  "total_duration_s": 1319.9,
  "n_input_spans": 144,
  "session_goal": "Sew floral fabric and green floral fabric with red trim, cut and trim edges, and hand-sew seams using sewing machine and scissors.",
  "sub_goals": [
    {
      "sub_goal_id": 1,
      "start_time": 0.0,
      "end_time": 411.0,
      "description": "Sew floral fabric and floral patterned fabric, then unpick and trim stitches.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 0.0,
          "end_time": 300.0,
          "description": "Sew floral fabric with sewing machine, reposition and inspect.",
          "span_indices": [
            0,
            1,
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            23,
            24,
            25,
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            31
          ]
        },
        {
          "episode_id": 2,
          "start_time": 300.0,
          "end_time": 363.0,
          "description": "Sew floral patterned fabric with sewing machine, repositioning for each pass.",
          "span_indices": [
            32,
            33,
            34,
            35,
            36,
            37,
            38,
            39,
            40,
            41,
            42,
            43
          ]
        },
        {
          "episode_id": 3,
          "start_time": 363.0,
          "end_time": 402.0,
          "description": "Unpick stitches from floral fabric with seam ripper and trim edges with scissors.",
          "span_indices": [
            44,
            45,
            46,
            47
          ]
        },
        {
          "episode_id": 4,
          "start_time": 402.0,
          "end_time": 411.0,
          "description": "Sew floral fabric with sewing machine and cut thread with pink scissors.",
          "span_indices": [
            48,
            49,
            50
          ]
        }
      ]
    },
    {
      "sub_goal_id": 2,
      "start_time": 411.0,
      "end_time": 600.0,
      "description": "Attach red trim to floral fabric, sew small and large pieces, and move sections.",
      "episodes": [
        {
          "episode_id": 5,
          "start_time": 411.0,
          "end_time": 446.0,
          "description": "Align and sew red trim to floral fabric, then move fabric to floor.",
          "span_indices": [
            51,
            52,
            53,
            54
          ]
        },
        {
          "episode_id": 6,
          "start_time": 446.0,
          "end_time": 514.0,
          "description": "Sew small floral piece, cut to shape, and attach to larger floral fabric.",
          "span_indices": [
            55,
            56,
            57,
            58,
            59,
            60
          ]
        },
        {
          "episode_id": 7,
          "start_time": 514.0,
          "end_time": 585.0,
          "description": "Sew large floral fabric, align and sew red trim, then move to floor.",
          "span_indices": [
            61,
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            64,
            65,
            66,
            67,
            68
          ]
        },
        {
          "episode_id": 8,
          "start_time": 585.0,
          "end_time": 600.0,
          "description": "Sew small floral piece to main floral fabric with sewing machine.",
          "span_indices": [
            69,
            70
          ]
        }
      ]
    },
    {
      "sub_goal_id": 3,
      "start_time": 600.0,
      "end_time": 875.0,
      "description": "Sew floral patterned fabric, fold edge, attach red trim, and sew edge.",
      "episodes": [
        {
          "episode_id": 9,
          "start_time": 600.0,
          "end_time": 680.0,
          "description": "Sew floral patterned fabric, cut excess, fold edge, and sew folded edge.",
          "span_indices": [
            71,
            72,
            73,
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            75,
            76,
            77,
            78
          ]
        },
        {
          "episode_id": 10,
          "start_time": 680.0,
          "end_time": 760.0,
          "description": "Position, align, cut, and sew red trim onto floral fabric.",
          "span_indices": [
            79,
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            83
          ]
        },
        {
          "episode_id": 11,
          "start_time": 760.0,
          "end_time": 846.0,
          "description": "Sew additional sections of floral fabric, remove, and inspect stitched seams.",
          "span_indices": [
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            89,
            90
          ]
        },
        {
          "episode_id": 12,
          "start_time": 846.0,
          "end_time": 875.0,
          "description": "Sew edge of floral fabric and trim excess thread and fabric edges.",
          "span_indices": [
            91,
            92
          ]
        }
      ]
    },
    {
      "sub_goal_id": 4,
      "start_time": 875.0,
      "end_time": 935.0,
      "description": "Hand-sew edges of floral fabric and green floral fabric.",
      "episodes": [
        {
          "episode_id": 13,
          "start_time": 875.0,
          "end_time": 900.0,
          "description": "Hand-sew edge of floral fabric with needle and thread.",
          "span_indices": [
            93
          ]
        },
        {
          "episode_id": 14,
          "start_time": 900.0,
          "end_time": 935.0,
          "description": "Hand-sew edge of green floral fabric with needle and thread.",
          "span_indices": [
            94
          ]
        }
      ]
    },
    {
      "sub_goal_id": 5,
      "start_time": 935.0,
      "end_time": 1200.0,
      "description": "Sew green floral fabric with sewing machine, cut thread, and inspect seams.",
      "episodes": [
        {
          "episode_id": 15,
          "start_time": 935.0,
          "end_time": 1135.0,
          "description": "Sew green floral fabric with sewing machine, reposition, and cut thread.",
          "span_indices": [
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          ]
        },
        {
          "episode_id": 16,
          "start_time": 1135.0,
          "end_time": 1200.0,
          "description": "Sew remaining sections of green floral fabric and inspect seams.",
          "span_indices": [
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        }
      ]
    },
    {
      "sub_goal_id": 6,
      "start_time": 1200.0,
      "end_time": 1319.9,
      "description": "Sew floral fabric sections, inspect, adjust, and cut thread.",
      "episodes": [
        {
          "episode_id": 17,
          "start_time": 1200.0,
          "end_time": 1293.8,
          "description": "Sew floral fabric with sewing machine, repositioning between passes.",
          "span_indices": [
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            139
          ]
        },
        {
          "episode_id": 18,
          "start_time": 1293.8,
          "end_time": 1319.9,
          "description": "Inspect and adjust sewn floral fabric, cut thread, and place scissors.",
          "span_indices": [
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          ]
        }
      ]
    }
  ]
}