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]: The Battle of Poltava in 1709 was a victory by Peter the Great over which state?
[A]: battle of poltava


[Q]: Who was the Roman equivalent of the Greek Goddess Artemis?
[A]:
artemis