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

Answer: prime minister of the united kingdom


Question: Chris Difford and Glenn Tilbrook founded which band in 1974?

Answer: chris difford


Question: In children's literature, which car did Commander Caractacus Potts drive?

Answer:
caractacus pott