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: OPERAS BASED ON PLAYS 
Clue: "The Queen of Cornwall", from a play by this author, premiered "Far from the Madding Crowd", in Glastonbury

SOLUTION: thomas hardy

PROBLEM: Category: U.S. GEOGRAPHY 
Clue: The West Point Military Reservation includes Constitution Island, which lies in this river

SOLUTION: the hudson river

PROBLEM: Category: A FEW CHOICE 4-LETTER WORDS 
Clue: It's the highest point or peak, or the notoriously unreliable company of choice for Wile E. Coyote

SOLUTION:
acme