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.

Category: THE ODYSSEY 
Clue: This goddess of wisdom pleads with Zeus to release Odysseus from the embrace of the nymph Calypso
athena

Category: 20TH CENTURY PRESIDENTS 
Clue: The Profile in Courage Award is presented on or near the anniv. of his birth; he would have been 80 May 29, 1997
john f. kennedy

Category: BIRTHSTONES 
Clue: This February birthstone is a violet variety of quartz

amethyst