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]: In which opera does a hunchback jester help his master, the Duke of Mantua, to seduce the daughter of a courtier?
[A]: duke of mantua


[Q]: Which English pop artist created The Beatles 'Sgt Pepper' album cover?
[A]:
sgt. pepper's lonely hearts club band