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: AMERICAN EXPLORERS 
Clue: After being led there by a local, Hiram Bingham claimed he "discovered" this lost Incan city in Peru

SOLUTION: machu picchu

PROBLEM: Category: TIME FOR A "CON"TEST 
Clue: Though it possibly dates from the 16th century, the origin of this word for a punny riddle is a mystery in itself

SOLUTION: conundrum

PROBLEM: Category: FRIENDS WITH BENEFITS 
Clue: The Rolling Stones brought their pals to this Canadian city for a 2003 benefit to help it recover from a SARS outbreak

SOLUTION:
toronto