{
  "session_id": "session_data_20260403_221605",
  "total_duration_s": 640.1,
  "n_input_spans": 70,
  "session_goal": "Fold shirts, shorts, and pants from a chair onto a couch and stack, then move folded stacks to a plastic chair.",
  "sub_goals": [
    {
      "sub_goal_id": 1,
      "start_time": 0.0,
      "end_time": 300.0,
      "description": "Fold and place shirts, shorts, and pants from the chair onto the couch.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 0.0,
          "end_time": 141.0,
          "description": "Observe clothes pile, then fold and place light green, red, dark gray, light gray, and dark blue shirts onto couch.",
          "span_indices": [
            0,
            1,
            2,
            3,
            4,
            5,
            6,
            7,
            8,
            9,
            10,
            11,
            12,
            13,
            14,
            15
          ]
        },
        {
          "episode_id": 2,
          "start_time": 141.0,
          "end_time": 167.0,
          "description": "Fold gray shorts and dark blue small garment and place on couch.",
          "span_indices": [
            16,
            17,
            18,
            19,
            20,
            21
          ]
        },
        {
          "episode_id": 3,
          "start_time": 167.0,
          "end_time": 249.0,
          "description": "Fold dark blue pants, light green pants, and light blue jeans and place on couch.",
          "span_indices": [
            22,
            23,
            24,
            25,
            26,
            27,
            28,
            29,
            30
          ]
        },
        {
          "episode_id": 4,
          "start_time": 249.0,
          "end_time": 283.0,
          "description": "Fold blue patterned shorts and floral patterned garment and place on couch.",
          "span_indices": [
            31,
            32,
            33,
            34,
            35,
            36
          ]
        },
        {
          "episode_id": 5,
          "start_time": 283.0,
          "end_time": 300.0,
          "description": "Pick up and fold yellow shirt.",
          "span_indices": [
            37,
            38
          ]
        }
      ]
    },
    {
      "sub_goal_id": 2,
      "start_time": 300.0,
      "end_time": 611.0,
      "description": "Fold and place garments onto a stack or into the chair.",
      "episodes": [
        {
          "episode_id": 6,
          "start_time": 300.0,
          "end_time": 402.5,
          "description": "Fold light patterned, white, and pink shirts and red, blue, purple, maroon shorts onto stack.",
          "span_indices": [
            39,
            40,
            41,
            42,
            43,
            44,
            45
          ]
        },
        {
          "episode_id": 7,
          "start_time": 402.5,
          "end_time": 481.5,
          "description": "Fold dark navy pants, pink graphic t-shirt, and black pants, place pants in chair and shirt on stack.",
          "span_indices": [
            46,
            47,
            48
          ]
        },
        {
          "episode_id": 8,
          "start_time": 481.5,
          "end_time": 565.5,
          "description": "Fold white pants, black garment, purple patterned shorts, white underwear, and blue, yellow, black garments onto stack.",
          "span_indices": [
            49,
            50,
            51,
            52,
            53,
            54,
            55
          ]
        },
        {
          "episode_id": 9,
          "start_time": 565.5,
          "end_time": 611.0,
          "description": "Fold gray sweatpants, dark blue garment, beige undergarment and clothing, place some in chair and some on couch stack.",
          "span_indices": [
            56,
            57,
            58,
            59,
            60
          ]
        }
      ]
    },
    {
      "sub_goal_id": 3,
      "start_time": 611.0,
      "end_time": 640.1,
      "description": "Move folded clothes from couch to plastic chair and fold remaining items.",
      "episodes": [
        {
          "episode_id": 10,
          "start_time": 611.0,
          "end_time": 617.0,
          "description": "Pick up stack of folded clothes from couch and place on plastic chair.",
          "span_indices": [
            61,
            62
          ]
        },
        {
          "episode_id": 11,
          "start_time": 617.0,
          "end_time": 621.0,
          "description": "Pick up, fold, and place white and black clothing on chair stack.",
          "span_indices": [
            63,
            64,
            65
          ]
        },
        {
          "episode_id": 12,
          "start_time": 621.0,
          "end_time": 640.1,
          "description": "Pick up, fold, and place black and light green clothing on chair stack, then look around.",
          "span_indices": [
            66,
            67,
            68,
            69
          ]
        }
      ]
    }
  ]
}