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]: What was the location of London's famous 17th century 'Frost Fairs'?
[A]: river thames


[Q]: Which king experienced regicide at the hands of Shakespeare's Macbeth?
[A]: king duncan


[Q]: Who wrote the opera Faust in 1859?
[A]:
charles gounod