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

[EX Q]: Who is the BBC's political editor?
[EX A]: bbc

[EX Q]: Joseph Addison and Richard Steele founded (in 1711), and Boris Johnson edited, which British magazine?
[EX A]: boris johnson

[EX Q]: What 2013 film is the highest-grossing animated movie of all-time?
[EX A]:
animation