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

[EX Q]: In which Shakespeare play do the characters Ajax, Achilles and Ulysses appear?
[EX A]: achilles

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

[EX Q]:  'The Black and Gold' is a nickname of which American football team?
[EX A]:
american football