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

[EX Q]: Which of North America's Great Lakes has the same name as a province of Canada?
[EX A]: canada

[EX Q]: What was the first Apollo mission to leave Earth orbit and orbit the moon, in 1968?
[EX A]: apollo

[EX Q]: Who played Ray Doyle, John Deed and George Gently on TV?
[EX A]:
judge john deed