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: OLD HISTORY 
Clue: In this work Virgil wrote that "a woman is always a fickle, unstable thing"

SOLUTION: the aeneid

PROBLEM: Category: I HEAR A SYMPHONY 
Clue: Mozart's 38th is called by the name of this city that stood in for Vienna in the filming of "Amadeus"

SOLUTION: prague

PROBLEM: Category: SPY VS. SPY 
Clue: This spy was executed at what's now 66th & 3rd in New York City

SOLUTION:
nathan hale