You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

[Q]: Category: LITERARY TRILOGIES 
Clue: "Number One" is actually the number two novel in a trilogy by this author of "U.S.A."
[A]: john dos passos


[Q]: Category: LANGUAGES 
Clue: The 2 languages on the Rosetta Stone
[A]: egyptian & greek


[Q]: Category: YOU GLOW! 
Clue: In 1862 Dungeness, on the Strait of Dover, became one of the first of these to use electric illumination
[A]:
lighthouse