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

[Q]: In which city were the 1912 Olympic games held Oslo, Antwerp or Stockholm?
[A]: 1912 summer olympics


[Q]: Who wrote `20,000 Leagues Under The Sea`?
[A]: 20,000 leagues under the sea


[Q]: In which US State could you visit the Carlsbad Caverns National Park?
[A]:
carlsbad caverns national park