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: Who played Bonnie in the 1967 film `Bonnie And Clyde`?

Answer: bonnie and clyde


Question: Which strong man appears in the Bible in the Book of Judges?

Answer: book of judges


Question: What was US singer and actor Dean Martin's only UK number one hit single?

Answer:
dean martin