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

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


[Q]: Forty hours before he committed suicide in 1945 Adolf Hitler married whom?
[A]: adolf hitler


[Q]: Who released the 1970 album called Atom Heart Mother?
[A]:
atom heart mother