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

Who was the first person to sign the American Declaration of Independence?
united states declaration of independence

In 2011, Christian Bale won a Best Supporting Actor Oscar for his role as an assistant to his half-brother in which boxing related film?
christian bale

Which multi-talented actor played Mr Burns and Derek Smalls?

mr. burns