{
  "session_id": "session_data_20260407_170655",
  "total_duration_s": 1282.1,
  "n_input_spans": 92,
  "session_goal": "Sew red patterned fabric pieces, triangular red fabric, and attach red fabric strips to form a garment using a sewing machine and scissors.",
  "sub_goals": [
    {
      "sub_goal_id": 1,
      "start_time": 0.0,
      "end_time": 300.0,
      "description": "Sew individual red patterned fabric pieces and triangular red fabric using sewing machine and scissors.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 0.0,
          "end_time": 83.0,
          "description": "Reposition wooden measuring stick, arrange red fabric, sew, and move first piece aside.",
          "span_indices": [
            0,
            1,
            2,
            3,
            4,
            5
          ]
        },
        {
          "episode_id": 2,
          "start_time": 83.0,
          "end_time": 135.0,
          "description": "Sew second red patterned fabric piece, cut thread, and move aside.",
          "span_indices": [
            6,
            7,
            8
          ]
        },
        {
          "episode_id": 3,
          "start_time": 135.0,
          "end_time": 185.0,
          "description": "Sew third red patterned fabric piece, cut thread, and move aside.",
          "span_indices": [
            9,
            10,
            11
          ]
        },
        {
          "episode_id": 4,
          "start_time": 185.0,
          "end_time": 257.0,
          "description": "Sew fourth red patterned fabric piece and place triangular red fabric on table.",
          "span_indices": [
            12,
            13,
            14
          ]
        },
        {
          "episode_id": 5,
          "start_time": 257.0,
          "end_time": 300.0,
          "description": "Sew triangular red patterned fabric with red trim, cut thread, and adjust.",
          "span_indices": [
            15,
            16,
            17
          ]
        }
      ]
    },
    {
      "sub_goal_id": 2,
      "start_time": 300.0,
      "end_time": 758.0,
      "description": "Sew larger red patterned fabric and mark green patterned fabric with blue marker and pen.",
      "episodes": [
        {
          "episode_id": 6,
          "start_time": 300.0,
          "end_time": 390.0,
          "description": "Sew new red patterned fabric, inspect, reposition, adjust sewing machine, and cut thread.",
          "span_indices": [
            18,
            19,
            20,
            21,
            22
          ]
        },
        {
          "episode_id": 7,
          "start_time": 390.0,
          "end_time": 552.0,
          "description": "Sew red patterned fabric with multiple seams, cut excess with pink scissors, and reposition.",
          "span_indices": [
            23,
            24,
            25,
            26,
            27,
            28,
            29,
            30,
            31,
            32,
            33,
            34,
            35,
            36,
            37,
            38,
            39,
            40,
            41,
            42,
            43,
            44
          ]
        },
        {
          "episode_id": 8,
          "start_time": 552.0,
          "end_time": 569.0,
          "description": "Adjust and mark green patterned fabric with blue marker, then place on table.",
          "span_indices": [
            45,
            46,
            47
          ]
        },
        {
          "episode_id": 9,
          "start_time": 569.0,
          "end_time": 617.0,
          "description": "Position red patterned fabric under sewing machine, sew, cut, and inspect.",
          "span_indices": [
            48,
            49,
            50,
            51,
            52
          ]
        },
        {
          "episode_id": 10,
          "start_time": 617.0,
          "end_time": 632.0,
          "description": "Mark green patterned fabric with blue pen.",
          "span_indices": [
            53
          ]
        },
        {
          "episode_id": 11,
          "start_time": 632.0,
          "end_time": 758.0,
          "description": "Sew red patterned fabric, cut thread, and cut fabric with pink scissors.",
          "span_indices": [
            54,
            55,
            56,
            57,
            58,
            59,
            60,
            61,
            62,
            63,
            64,
            65
          ]
        }
      ]
    },
    {
      "sub_goal_id": 3,
      "start_time": 758.0,
      "end_time": 980.7,
      "description": "Sew red fabric strips and attach them to the main red garment using sewing machine.",
      "episodes": [
        {
          "episode_id": 12,
          "start_time": 758.0,
          "end_time": 779.0,
          "description": "Position and sew red fabric strip with sewing machine.",
          "span_indices": [
            66,
            67
          ]
        },
        {
          "episode_id": 13,
          "start_time": 779.0,
          "end_time": 788.0,
          "description": "Pick up black water bottle from table and place on right side.",
          "span_indices": [
            68,
            69
          ]
        },
        {
          "episode_id": 14,
          "start_time": 788.0,
          "end_time": 900.0,
          "description": "Sew red fabric strips, align with main fabric, and attach with sewing machine.",
          "span_indices": [
            70,
            71,
            72,
            73,
            74,
            75,
            76,
            77
          ]
        },
        {
          "episode_id": 15,
          "start_time": 900.0,
          "end_time": 953.8,
          "description": "Continue aligning and sewing red fabric strip to red garment edge.",
          "span_indices": [
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            86
          ]
        },
        {
          "episode_id": 16,
          "start_time": 953.8,
          "end_time": 980.7,
          "description": "Inspect seam, sew additional edge, cut thread, place scissors, and adjust garment.",
          "span_indices": [
            87,
            88,
            89,
            90,
            91
          ]
        }
      ]
    }
  ]
}