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.

What president is named in the theme song to all in the family?
Herbert Hoover

Who played guitar in no sleep till brooklyn?
guitarist for Slayer

Who played the biggest role in creating the first universities in europe?

Christianity