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


[Q]: Because the fourth movement is a variation on one of the composer's earlier works concerning a particular creature, by what name is Franz Schubert's 'Piano Quintet in A major' better known?
[A]: trout quintet


[Q]: 'Quicksilver' is another name for which metallic element?
[A]:
mercury