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

[Q]: Who succeeded Jon Pertwee as Doctor Who?
[A]: doctor who


[Q]: Miss Rosa Dartle is a character in which Charles Dickens novel?
[A]: james steerforth


[Q]: Angela Grisanti Vecchio, Stanley Zbornak, Clayton Hollingsworth and Salvadore Petrillo are characters in what US television series?
[A]:
sophia petrillo