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

In which opera does a hunchback jester help his master, the Duke of Mantua, to seduce the daughter of a courtier?
duke of mantua

Which boxer won a 1.8m claim against promotor Frank Warren in March 2009?
boxing

Which Walt Disney animated feature film bombed when it was first released in 1940, only eventually reaching profit in 1945?
walt disney animation studios