Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

Who was the first man to run a sub four minute mile?
roger bannister

Which US president was in office at the start of the Korean War?
truman

Who played King Louis XIV of France and his twin brother Philippe in the 1977 film 'The Man in the Iron Mask'?
richard chamberlain