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

[Q]: Aldebaran is the brightest star in which constellation?
[A]: aldebaran


[Q]: What was the computer's name in 2001: A Space Odyssey?
[A]: 2001: a space odyssey


[Q]: The Gaillard Cut is part of which canal connecting the Atlantic and Pacific Oceans?
[A]:
canal