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

[Q]: Which 1995 'Space' move starred Tom Hanks; Bill Paxton and Kevin Bacon?
[A]: tom hanks


[Q]: What is the capital city of Colombia?
[A]: colombia


[Q]: Wagner, Verdi, Bellini and Rossini are famous composers of particularly what type of music?
[A]:
richard wagner