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

[EX Q]: The plays 'The Barber of Seville' and 'Marriage of Figaro' were written by whom?
[EX A]: the marriage of figaro

[EX Q]: Which film actor (1895-1926) is known for his films The Four Horsemen, The Sheik and Blood And Sand?
[EX A]: blood and sand

[EX Q]: Bob Gaudio and Nick Massi sang with which group?
[EX A]:
nick massi