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

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


[Q]: Which singer provides the voice for Chef in South Park?
[A]: chef


[Q]: On what date on the Christian calendar is the day of the Annunciation or Lady Day?
[A]:
annunciation