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.
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Question: What word is used in mathematics to mean if and only if?

Answer: if and only if


Question: In the TV programme '24', what is the name of the character played by Kiefer Sutherland?

Answer: jack bauer


Question: Which conflict began in England in 1455 after King Henry VI, following a troubled reign, had a long period of mental withdrawal?

Answer:
wars of the roses