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

[Q]: Which country is currently ruled by the Chakri dynasty that has been in power since 1782?
[A]: chakri dynasty

[Q]: Besides the Caucasus, what mountain range forms the border of Europe and Asia?
[A]: asia

[Q]: Who bad a number 1 in the 1980's with Circle in the Sand?
[A]:
circle in the sand