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

[Q]: Double vision, the perception of two images from a single object, is properly called what?
[A]: double vision


[Q]: Barabas is the central character in what 16th century play?
[A]: barabas


[Q]: What is a baby seal called?
[A]:
baby