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: Richard Addinsell's most famous piece of music was used in the 1941 film 'Dangerous Moonlight', what is its title?

Answer: dangerous moonlight


Question: Antonio Salazar was the virtual dictator of which country from 1932 to 1968?

Answer:
antonio de oliveira salazar