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 `brothers` had a number one hit in May 1958 with `All I Have To Do Is Dream`?

Answer: all i have to do is dream


Question: In Curse of the Pink Panther who plays Clouseau after surgery?

Answer: curse of the pink panther


Question: Which English King was born at Caenarvon Castle in 1284?

Answer:
caernarfon castle