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: The bells were ringing for Chuck Berry when this song made it to No1. His first and only British No. 1. What song?

Answer: chuck berry


Question: 'Highway 61 Revisited' and 'Blood On The Tracks' were both albums released by which popular singer?

Answer: highway 61 revisited


Question: A.A. Milne is most famous for creating which Bear?

Answer:
a. a. milne