Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
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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: Chelsea won the 2009 FA Cup final 2-1. Who were the beaten finalists?

Answer: 2009 fa cup final

Question: What venue hosted the 2008 Superbowl?

Answer:
super bowl xlii