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 simplicity, answers should be in all lower cased letters.
PROBLEM: Category: STATES' SOUTHWEST CORNERS 
Clue: This state's is just north of the Columbia River

SOLUTION: washington

PROBLEM: Category: VERY GRIMM TALES 
Clue: In the original Grimm Brothers version, after the miller's daughter guessed his name, he tore himself in two

SOLUTION: rumpelstiltskin

PROBLEM: Category: THE THEATER 
Clue: Marion Paroo, the River City librarian, teaches piano to the town's youngsters in this show

SOLUTION:
"the music man"