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: Richard Addinsell's most famous piece of music was used in the 1941 film 'Dangerous Moonlight', what is its title?

Answer: dangerous moonlight


Question: In which city in Texas is the fortress known as 'The Alamo', to be found?

Answer:
battle of the alamo