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

[Q]: Which Best Picture nominated movie tells the story of US soldier, 'Chris' Kyle?
[A]: chris kyle


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


[Q]: Urs Buhler, Sebastian Izambard, Carlos Martin and David Millercomprise which singing group?
[A]:
carlos marin