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: "W"HODUNNIT? 
Clue: He was the first U.S. president to be unanimously elected

SOLUTION: george washington

PROBLEM: Category: RELIGION 
Clue: Some 3 million pilgrims visit this small French town annually

SOLUTION: lourdes

PROBLEM: Category: THEIR GREATEST HITS ALBUMS 
Clue: "Forty Licks" (2002) & "Hot Rocks: 1964-1971 "

SOLUTION:
the rolling stones