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

[Q]: Who composed the opera 'Albert Herring' in 1947?
[A]: albert herring


[Q]: 'Dookie' and '21st. Century Breakdown' are albums by which American rock band?
[A]: 21st century breakdown


[Q]: Which philosopher wrote the satirical 1759 novel Candide?
[A]:
candide