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

[Q]: The film Schindler's List was based on whose Booker Prize winning novel of 1982?
[A]: schindler's list

[Q]: Which former Portuguese African Colony joined the British Commonwealth in 1995?
[A]: commonwealth of nations

[Q]: Which state did Bill Clinton represent as senator?
[A]:
united states senate