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.

Category: ALSO AT THE 2000 GRAMMYS 
Clue: The Best Long Form Music Video featured this "fiery" rock guitarist who died in 1970
jimi hendrix

Category: AMERICAN HISTORY 
Clue: After 3 previous acquittals, this reputed crime family boss was finally convicted in New York City on April 2, 1992
john gotti

Category: ANCIENT GREECE 
Clue: According to Collier's Ency., in the 7th cent. this city-state won most of the recorded Olympic victories

sparta