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

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

Ex Output:
duke of mantua


Ex Input:
Beaune, Nuits St George and Chambertin are wines from which French wine region?

Ex Output:
beaune


Ex Input:
Canary Wharf is in what London borough?

Ex Output:

canary wharf