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

[Q]: 'Edward Lewis' and 'Vivian Ward' were the principal characters in which popular 1990 film?
[A]: edward lewis

[Q]: Name Alfred Hitchcock's first sound film as director?
[A]: alfred hitchcock

[Q]: Who composed the music for the 1937 ballet Checkmate?
[A]:
checkmate