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.

[EX Q]: Category: SHE WAS IN THAT? 
Clue: She was an extra in Charlie Chaplin's "City Lights" before she starred in "Platinum Blonde"
[EX A]: jean harlow

[EX Q]: Category: FICTIONAL CHARACTERS 
Clue: Lassiter is the gun-slinging hero of this Zane Grey novel & appears in its sequel "The Rainbow Trail"
[EX A]: "riders of the purple sage"

[EX Q]: Category: GEOLOGY 
Clue: Corundum makes up much of this rock used to make an abrasive "board"
[EX A]:
emery