Task: Question Answering
Input (English): Context: Since then we have n't done anything like that again but I admit I do sort of miss it . But now it was time for us to play a joke on them and we refused to fail . " Tricky , you go set up the camera on the other side of the pool and make sure you can get everything on tape . " " Panda , give me a few minutes to set up first ok ? " " Sure . 
Question: Why are the people setting up a camera at the pool ?
Output (English): They want to play a prank on their friends .