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: What currency is used on Christmas Island?

Answer: christmas island


Question: Which Renaissance artist's life was fictionalised in the book 'The Agony and the Ecstasy' subsequently made into a film?

Answer: the agony and the ecstasy


Question: Who composed the music for the ballet Cinderella?

Answer:
cinderella