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 Brooklyn Bridge crosses which river?

Answer: brooklyn bridge


Question: The film Schindler's List was based on whose Booker Prize winning novel of 1982?

Answer: schindler's list


Question: In 1984 which Bruce Springsteen song was the first to win a Grammy for him (He has won 20 in all)?

Answer:
bruce springsteen