The video above shows a robot manipulation episode in full. Look at
the entire video and describe in ONE concise sentence what the robot
is doing.

Rules:
- One sentence, in natural English, like a user instruction.
- Capture the goal of the demonstration, not low-level motions.
  Example: "place the yellow cube into the red bin" — not "move the
  end-effector down 5cm and close the gripper".
- 4 to 15 words. Plain prose, no markdown, no bullets, no quotes.
- Do not invent objects or actions that aren't visible.
- Do not output anything other than the JSON object below.

Output strictly valid JSON:
  {{
    "task": "<single concise sentence describing what the robot does in this video>"
  }}
