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

Example Input: Zoey Barkow, Kevin Peyton, Eddie Walzer and Fitch Cooper are all characters in which US television series?
Example Output: merritt wever

Example Input: In which 1960's TV series did Clarence the cross-eyed lion appear?
Example Output: clarence, the cross-eyed lion

Example Input: Which British poet wrote 'A Child's Christmas in Wales'?
Example Output:
a child's christmas in wales