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: THE CHIEFS 
Clue: This Chief Justice in the Dred Scott decision earlier served as Attorney General under Andrew Jackson
[EX A]: taney

[EX Q]: Category: BORDERS 
Clue: Argentina's border with this country is 3,200 miles long, about the same as its coastline
[EX A]: chile

[EX Q]: Category: FUN WITH BALLET 
Clue: Models, gendarmes & a Tour de France cyclist appear in the Gershwin ballet "An American in" this city
[EX A]:
paris