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 consistency, answers should be in all lower cased letters.
PROBLEM: Category: EPITAPHS 
Clue: "Truth and history.  21 men.  The boy bandit king -- he died as he had lived"

SOLUTION: billy the kid

PROBLEM: Category: GUINNESS RECORDS 
Clue: With an average of 80.5 years, this Asian country leads the world in life expectancy

SOLUTION: japan

PROBLEM: Category: ARGENTINA 
Clue: Both Argentina & the Rio de la Plata derive their names from the Latin word for this

SOLUTION:
silver