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

[Q]: Which rank of the peerage is directly below a duke?
[A]: duke


[Q]: Ride of the Valkyries is the official quick march of which branch of the British Army?
[A]: british army


[Q]: In which book of the Christian Bible is the story of Lazarus being raised from the dead?
[A]:
bible