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

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


[Q]: Name Shakespeare play Ariel, Miranda and Prospero appear?
[A]: ariel


[Q]: Who played Catherine of Aragon in 'The Six Wives of Henry VIII' AND Queen Victoria in 'Edward VII'?
[A]:
queen victoria