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

Example Input: Which singer played Billie Holiday in the 1972 film `Lady Sings The Blues`?
Example Output: lady sings the blues

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

Example Input: Name the Town and Country where Christopher Columbus was born?
Example Output:
christopher columbus