Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

[Q]: Henry VIII had six wives, but which of his wives had four husbands?
[A]: catherine parr

[Q]: The March of the Toreadors comes from an Opera by which composer?
[A]: bizet

[Q]: Who is credited with the phrase I think, therefore I am?
[A]:
rene descartes