Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Q: Who composed 'Eine Kleine Nachtmusik' in the 18th Century?

A: eine kleine nachtmusik
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Q: The Bryce Canyon and Zion National Parks are in which US state?

A: bryce canyon national park
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Q: Which European country has land borders with Austria, Hungary, Italy and Croatia?

A:
hungary
****