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.

Input: Consider Input: Category: SIGNS & SYMBOLS 
Clue: Symbols of mystery, they're the mysterious doubles of the people who cast them

Output: shadows


Input: Consider Input: Category: "KING" OF THE TOP 40 
Clue: "It's Too Late" & "So Far Away" were 1971 hits for her

Output: carole king


Input: Consider Input: Category: MEDICAL MILESTONES 
Clue: News of his rabies vaccine spread throughout the world after it proved successful in 1885


Output: pasteur