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 nationality was the composer Bela Bartok?

Answer: bela bartok


Question: Making his debut for Sunderland last season, who is the only footballer from Benin ever to play in the Premier League?

Answer: sunderland


Question: Argentinian David Nalbandian is a professional player of what sport?

Answer:
david nalbandian