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

[Q]: Which composer was married to Clara Wieck from 1840 until his death in 1856?
[A]: clara schumann


[Q]: What country has an official residence called Blair House, kept for guests of the leader of the country?
[A]: blair


[Q]: In which US state are the cities of Billings, Great Falls and Missoula?
[A]:
missoula, montana