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]: From which opera by Mascagni does the famous Easter Hymn come?
[A]: cavalleria rusticana


[Q]: Sophie, Mark and Jeremy are the three main characters in which UK Channel 4 television series?
[A]: peep show


[Q]: Which Greek mathematician, active in Alexandria during the reign of Ptolemy I and often referred to as the Father of Geometry, published the textbook Elements?
[A]:
euclid