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

[EX Q]: Who won the Women's Singles at the 2015 Australian Open Tennis Championships?
[EX A]: the championships, wimbledon

[EX Q]: To which actress is Daniel Craig married?
[EX A]: daniel craig

[EX Q]: Mr Barkis, Edward Murdstone and Tommy Traddles are all characters in which Charles Dickens novel?
[EX A]:
charles dickens