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

[EX Q]: Where is the Barbary Coast?
[EX A]: barbary coast

[EX Q]: Of all the actors who played Doctor Who in the TV series of the same name, who appeared in the most episodes?
[EX A]: doctor who

[EX Q]: Which country is bordered by Italy, Austria, Croatia and Hungary?
[EX A]:
hungary