{
  "session_id": "session_data_20260407_094320",
  "total_duration_s": 1134.6,
  "n_input_spans": 101,
  "session_goal": "Sew red patterned fabric pieces and gold fabric strips and gold ribbon into assembled fabric projects using a sewing machine.",
  "sub_goals": [
    {
      "sub_goal_id": 1,
      "start_time": 0.0,
      "end_time": 359.0,
      "description": "Sew red patterned fabric pieces on worktable using sewing machine and scissors.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 0.0,
          "end_time": 90.0,
          "description": "Set up sewing machine and arrange red patterned fabric pieces on worktable.",
          "span_indices": [
            0,
            1,
            2,
            3,
            4
          ]
        },
        {
          "episode_id": 2,
          "start_time": 90.0,
          "end_time": 152.0,
          "description": "Sew and inspect first red patterned fabric piece with sewing machine.",
          "span_indices": [
            5,
            6
          ]
        },
        {
          "episode_id": 3,
          "start_time": 152.0,
          "end_time": 189.0,
          "description": "Align and sew two red patterned fabric pieces together with sewing machine.",
          "span_indices": [
            7,
            8
          ]
        },
        {
          "episode_id": 4,
          "start_time": 189.0,
          "end_time": 235.0,
          "description": "Sew additional red fabric sections and trim excess thread with scissors.",
          "span_indices": [
            9,
            10,
            11,
            12
          ]
        },
        {
          "episode_id": 5,
          "start_time": 235.0,
          "end_time": 300.0,
          "description": "Arrange matched red fabric pieces, sew, and cut thread with scissors.",
          "span_indices": [
            13,
            14,
            15
          ]
        },
        {
          "episode_id": 6,
          "start_time": 300.0,
          "end_time": 359.0,
          "description": "Sew, adjust, cut, and place red patterned fabric pieces on worktable.",
          "span_indices": [
            16,
            17,
            18,
            19,
            20,
            21,
            22,
            23
          ]
        }
      ]
    },
    {
      "sub_goal_id": 2,
      "start_time": 359.0,
      "end_time": 457.0,
      "description": "Cut gold fabric into strips with scissors and arrange pile on worktable.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 359.0,
          "end_time": 420.0,
          "description": "Arrange gold fabric and cut first three strips with scissors on worktable.",
          "span_indices": [
            24,
            25,
            26,
            27,
            28,
            29,
            30,
            31,
            32
          ]
        },
        {
          "episode_id": 2,
          "start_time": 420.0,
          "end_time": 457.0,
          "description": "Cut three more gold fabric strips and arrange pile on worktable.",
          "span_indices": [
            33,
            34,
            35,
            36,
            37,
            38,
            39
          ]
        }
      ]
    },
    {
      "sub_goal_id": 3,
      "start_time": 457.0,
      "end_time": 1134.6,
      "description": "Sew red patterned fabric with gold fabric strips and gold ribbon using sewing machine.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 457.0,
          "end_time": 600.0,
          "description": "Set up machine and sew first set of gold and red fabric strips together.",
          "span_indices": [
            40,
            41,
            42,
            43,
            44,
            45,
            46,
            47,
            48,
            49
          ]
        },
        {
          "episode_id": 2,
          "start_time": 600.0,
          "end_time": 711.0,
          "description": "Sew gold ribbon onto first red fabric piece using sewing machine.",
          "span_indices": [
            50,
            51,
            52,
            53,
            54,
            55
          ]
        },
        {
          "episode_id": 3,
          "start_time": 711.0,
          "end_time": 900.0,
          "description": "Sew gold ribbon onto second red fabric piece and remove to finished pile.",
          "span_indices": [
            56,
            57,
            58,
            59,
            60,
            61,
            62,
            63,
            64,
            65,
            66,
            67
          ]
        },
        {
          "episode_id": 4,
          "start_time": 900.0,
          "end_time": 988.0,
          "description": "Sew red fabric strip with gold trim and ribbon using sewing machine.",
          "span_indices": [
            68,
            69,
            70,
            71,
            72,
            73,
            74,
            75,
            76,
            77,
            78,
            79
          ]
        },
        {
          "episode_id": 5,
          "start_time": 988.0,
          "end_time": 1114.0,
          "description": "Sew more red fabric strips with gold ribbon and trim using sewing machine.",
          "span_indices": [
            80,
            81,
            82,
            83,
            84,
            85,
            86,
            87,
            88,
            89,
            90,
            91,
            92,
            93,
            94,
            95,
            96
          ]
        },
        {
          "episode_id": 6,
          "start_time": 1114.0,
          "end_time": 1134.6,
          "description": "Remove sewn strip from machine, cut thread, and prepare new fabric strip.",
          "span_indices": [
            97,
            98,
            99,
            100
          ]
        }
      ]
    }
  ]
}