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

Ornette Coleman, Louis Armstrong and Charles Mingus are associated with what style of music?
charles mingus

Who married Welsh actress Catherine Zeta Jones in 2000?

catherine zeta-jones