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 did boxer Floyd Patterson defeat to regain the Heavyweight Championship in June 1960?

Answer: boxing

Question: Lopburi, Phichit and Ang Thong are provinces in which Asian country?

Answer: phichit

Question: Who played oil baron Clayton Farlow in the 80's soap Dallas?

Answer:
clayton farlow