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: ELTON JOHN 
Clue: In 1997 Elton John recorded a new version of this song as a tribute to Princess Diana

SOLUTION: "candle in the wind"

PROBLEM: Category: ALL I WANT FOR CHRISTMAS IS... 
Clue: ...the E100 electric one of these from Razor

SOLUTION: a scooter

PROBLEM: Category: PULITZER-WINNING BIOGRAPHIES & AUTOBIOGRAPHIES 
Clue: Title length of time in Arthur Schlesinger Jr.'s 1966 prize-winner subtitled "John F. Kennedy in the White House"

SOLUTION:
a thousand days