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 are Proxima Centauri, Sirius A, Pollux, Arcturus and Betelgeuse?

Answer: arcturus

Question: The towns od Grimsby and Cleethorpes are in which English county?

Answer: grimsby

Question: In which Texas city is the Alamo?

Answer:
battle of the alamo