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

Ex Input:
July 1938 saw the first ascent of the North Face of which Alpine mountain?

Ex Output:
alps

Ex Input:
The Greeks called her Athena, what was the Roman name for this Goddess?

Ex Output:
athena

Ex Input:
For what role is actor Buster Crabbe best known?

Ex Output:
buster crabbe