instruction:
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.
question:
Category: SEEING THE LIGHT 
Clue: "The sun's coming up"?  No, this character says, "Envious streaks do lace the severing clouds in yonder east"
answer:
romeo


question:
Category: RULERS 
Clue: In 770 this king of the Franks married Desiderata, daughter of the Lombard king Desiderius
answer:
charlemagne


question:
Category: PHYSICS 
Clue: I shot an arrow into the air; if not for friction, it would have formed this plane curve, from the Greek for "to compare"
answer:

a parabola