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

[EX Q]: Lopburi, Phichit and Ang Thong are provinces in which Asian country?
[EX A]: phichit

[EX Q]: Which British TV star and disc jockey said `It`s not affected my work - how healthy do you have to be to play Da Do Ron Ron` in 1992 after confirming he had AIDS?
[EX A]: hiv/aids

[EX Q]: What country uses the Dong as its currency?
[EX A]:
vietnamese dong