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: CARTS, WAGONS & SLEDS 
Clue: Used to transport small loads like lawn dirt, it's a cart with 1 tire & a shallow body, held & pushed by handles

SOLUTION: a wheelbarrow

PROBLEM: Category: TOYMAKERS 
Clue: In 1997 Mattel sued Miller'$, a magazine devoted to this fashion doll, for copyright infringement

SOLUTION: barbie

PROBLEM: Category: THE OLD WEST 
Clue: Wyatt Earp's brother Morgan survived this 1881 gunfight but was murdered 5 months later

SOLUTION:
o.k. corral