instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
In 2013 Yahoo purchased which pictures and video microblogging website business that was founded in 2007 in New York City by David Karp?
answer:
yahoo!


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


question:
Now say Chatillon, what would France with us is the opening line in which Shakespeare play?
answer:

chatillon