TASK DEFINITION: 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 consistency, answers should be in all lower cased letters.
PROBLEM: Category: MUSICALS IN OTHER WORDS 
Clue: "P.T."

SOLUTION: "barnum"

PROBLEM: Category: FIREFIGHTING 
Clue: Early NYC firemen were alerted with rattles--so you might have a 3-rattle fire where today we'd have this equivalent

SOLUTION: a 3-alarm fire

PROBLEM: Category: HISTORICAL NOVELS 
Clue: "Cosette", part 2 of this classic novel, begins with a chapter titled "Waterloo"

SOLUTION:
les misérables