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: Which film director won the Oscar for Best Picture for the film 12 Years a Slave in 2013?

Answer: 12 years a slave


Question: Who composed Air on the G String?

Answer: air on the g string


Question: The Duke of Wellington was born in which city?

Answer:
arthur wellesley, 1st duke of wellington