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

[EX Q]: Zoey Barkow, Kevin Peyton, Eddie Walzer and Fitch Cooper are all characters in which US television series?
[EX A]: merritt wever

[EX Q]: The Brooklyn Bridge crosses which river?
[EX A]: brooklyn bridge

[EX Q]: First shown in 1984, which sit-com featured the characters Cliff and Clair Huxtable?
[EX A]:
sitcom