In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.

Who sings change the world with eric clapton?
Kenneth "Babyface" Edmonds

Who played boo radley in the movie to kill a mockingbird?
Robert Selden Duvall

Who said never was so much owed to so many by so few?

Winston Churchill