Task: Question Answering
Input (English): Passage: My camera stopped working . I pressed the power button and nothing happened . When the green light did not appear I thought the batteries might be dead .  After a few minutes I found a package of batteries under a pile of papers . I placed the camera on the desk too open the package . I took two batteries and put the package back in the drawer before closing it .  I looked inside the compartment to see which way the batteries should go and inserted one battery with the flat end pushed against the silver spring inside . I slid the other battery in next to it pointing in the opposite direction . I closed the battery compartment and pressed the power button and a green light on the camera blinked brightly . Question: What did they open on the camera? Option1: the back Option2: the button
Output (English): the back