{
  "session_id": "session_data_20260408_074809",
  "total_duration_s": 1036.1,
  "n_input_spans": 100,
  "session_goal": "Sew large pink floral fabric with green trim, sew pink and orange floral fabric with trim, and sew a pink floral garment using a sewing machine and scissors.",
  "sub_goals": [
    {
      "sub_goal_id": 1,
      "start_time": 0.0,
      "end_time": 300.0,
      "description": "Sort pink floral fabric pieces, sew fabric edges, and attach green trim with sewing machine.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 0.0,
          "end_time": 66.0,
          "description": "Adjust machine, sort fabric, and sew small pink fabric piece.",
          "span_indices": [
            0,
            1,
            2,
            3,
            4,
            5,
            6,
            7
          ]
        },
        {
          "episode_id": 2,
          "start_time": 66.0,
          "end_time": 85.0,
          "description": "Retrieve large pink floral fabric from bed and lay on worktable.",
          "span_indices": [
            8,
            9,
            10
          ]
        },
        {
          "episode_id": 3,
          "start_time": 85.0,
          "end_time": 165.0,
          "description": "Sew edges of large pink floral fabric and cut sewing thread.",
          "span_indices": [
            11,
            12,
            13,
            14,
            15,
            16,
            17,
            18
          ]
        },
        {
          "episode_id": 4,
          "start_time": 165.0,
          "end_time": 300.0,
          "description": "Align and sew green trim onto large pink floral fabric.",
          "span_indices": [
            19,
            20,
            21,
            22,
            23,
            24,
            25,
            26,
            27,
            28,
            29,
            30,
            31,
            32,
            33,
            34
          ]
        }
      ]
    },
    {
      "sub_goal_id": 2,
      "start_time": 300.0,
      "end_time": 600.0,
      "description": "Sew pink and orange floral fabric, attach trim, and finish edges with sewing machine.",
      "episodes": [
        {
          "episode_id": 5,
          "start_time": 300.0,
          "end_time": 396.0,
          "description": "Sew pink and orange floral fabric and cut sewing thread.",
          "span_indices": [
            35,
            36,
            37,
            38
          ]
        },
        {
          "episode_id": 6,
          "start_time": 396.0,
          "end_time": 487.8,
          "description": "Position and sew trim strip onto pink and orange floral fabric.",
          "span_indices": [
            39,
            40,
            41,
            42
          ]
        },
        {
          "episode_id": 7,
          "start_time": 487.8,
          "end_time": 574.8,
          "description": "Fold fabric edge, sew, and cut thread.",
          "span_indices": [
            43,
            44,
            45
          ]
        },
        {
          "episode_id": 8,
          "start_time": 574.8,
          "end_time": 600.0,
          "description": "Sew new fabric section and inspect finished piece on table.",
          "span_indices": [
            46,
            47,
            48,
            49
          ]
        }
      ]
    },
    {
      "sub_goal_id": 3,
      "start_time": 600.0,
      "end_time": 1036.1,
      "description": "Sew pink floral fabric edges into a garment using sewing machine and scissors.",
      "episodes": [
        {
          "episode_id": 9,
          "start_time": 600.0,
          "end_time": 649.5,
          "description": "Adjust and sew first edges of pink floral fabric, cut thread.",
          "span_indices": [
            50,
            51,
            52,
            53,
            54,
            55,
            56
          ]
        },
        {
          "episode_id": 10,
          "start_time": 649.5,
          "end_time": 754.5,
          "description": "Fold and sew sections of pink floral fabric, cut thread.",
          "span_indices": [
            57,
            58,
            59,
            60,
            61,
            62,
            63,
            64,
            65,
            66
          ]
        },
        {
          "episode_id": 11,
          "start_time": 754.5,
          "end_time": 869.5,
          "description": "Align and sew edges and sections of pink floral fabric.",
          "span_indices": [
            67,
            68,
            69,
            70,
            71,
            72,
            73,
            74,
            75,
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            77,
            78
          ]
        },
        {
          "episode_id": 12,
          "start_time": 869.5,
          "end_time": 908.0,
          "description": "Sew final section of pink floral fabric and cut excess thread.",
          "span_indices": [
            79,
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            82,
            83,
            84
          ]
        },
        {
          "episode_id": 13,
          "start_time": 908.0,
          "end_time": 991.0,
          "description": "Sew edges and sections of pink floral fabric, cut thread.",
          "span_indices": [
            85,
            86,
            87,
            88,
            89,
            90,
            91,
            92,
            93
          ]
        },
        {
          "episode_id": 14,
          "start_time": 991.0,
          "end_time": 1036.1,
          "description": "Sew final edges, cut thread, and lift finished pink floral fabric.",
          "span_indices": [
            94,
            95,
            96,
            97,
            98,
            99
          ]
        }
      ]
    }
  ]
}