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 former Blue Peter presenter died in April 2004, aged 41?

Answer: blue peter


Question: Who won the 2011 Booker Prize for 'The Sense of an Ending'?

Answer: the sense of an ending


Question: Actors Saoirse Ronan, Julie Walter, Domnhall Gleeson and Jim Broadbent appeared in which film?

Answer:
jim broadbent