TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Double vision, the perception of two images from a single object, is properly called what?

SOLUTION: double vision

PROBLEM: Austin is the state capitol of which US State?

SOLUTION: austin, texas

PROBLEM: Alfredo di Stefano, of Real Madrid fame was born in which country?

SOLUTION:
alfredo di stefano