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: In which British city would you find Barlinnie prison?

Answer: hm prison barlinnie


Question: Which hero of science fiction was created by Alex Raymond?

Answer: alex raymond


Question: Which fellow rocker, whose biggest hit was Be-Bop-A-Lula, survived the car crash which killed Eddie Cochrane in 1960?

Answer:
be-bop-a-lula