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

[EX Q]: In 1867 who became the first Prime Minister of Canada?
[EX A]: prime minister of canada

[EX Q]: Which four letter word beginning with 'F' is a white crumbly Greek cheese, made from sheep's or goats milk and cured in brine?
[EX A]: sheep

[EX Q]: In fiction who was Don Diego de la Vega?
[EX A]:
don diego de la vega