You are given an open-domain question from an open movie database. Your task is to provide an answer to that question. Try to only include the answer. Do not put it in a sentence.

who acted in the movie The Couch Trip?
Dan Aykroyd, Walter Matthau, Charles Grodin, Donna Dixon

who was the writer of the film Mystery Road?
Ivan Sen

what does Nicolas Ronchi act in?
Simon Killer