Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
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Question: What was the computer's name in 2001: A Space Odyssey?

Answer: 2001: a space odyssey


Question: What style of facial hair was famously worn by American Civil War general Ambrose Burnside?

Answer: ambrose burnside


Question: Elective Affinities is a work by which painter?

Answer:
elective affinities