| {"subtask_index": 0, "subtask": "Place the block at the correct position to assemble the letter S."} | |
| {"subtask_index": 1, "subtask": "out of view."} | |
| {"subtask_index": 2, "subtask": "End."} | |
| {"subtask_index": 3, "subtask": "Pick up the block on the table."} | |
| {"subtask_index": 4, "subtask": "null."} | |