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 did Banting and Best discover in 1921?

Answer: charles herbert best


Question: In which range of mountains are the two highest peaks Aconcagua and Ojos Del Salado?

Answer: aconcagua


Question: Which 1957 film directed by David Lean was the story of the construction and demolition of a civil engineering work in Burma?

Answer:
david lean