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 composer was married to Clara Wieck from 1840 until his death in 1856?

Answer: clara schumann


Question: What is the SI unit of capacitance?

Answer: capacitance


Question: Anna Leonowens is a character in which 1956 film?

Answer:
anna leonowens