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 Best Picture nominated movie tells the story of US soldier, 'Chris' Kyle?

Answer: chris kyle


Question: Which is the largest continent on Earth?

Answer: earth


Question: Name the Danny Boyle biopic about a climber trapped by a boulder for more than five days?

Answer:
danny boyle