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]: Who directed the 1975 film 'French Connection 2'?
[A]: john frankenheimer


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


[Q]: According to Greek mythology, what was the name of the three headed dog which guarded the entrance to the underworld?
[A]:
cerberus