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: Who wrote '20,000 Leagues Under The Sea'?

Answer: 20,000 leagues under the sea

Question: Ewart was the middle name of which British Prime Minister?

Answer: prime minister of the united kingdom

Question: Which stage musical features 'Audrey II', the man-eating plant?

Answer:
audrey ii