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: CLASSICAL MYTHOLOGY 
Clue: Achilles died after one of these weapons wounded him in the heel
an arrow

Category: OSCAR-WINNING SONGS 
Clue: This song about precipitation won Burt Bacharach & Hal David a 1969 Oscar
"raindrops keep fallin\' on my head"

Category: DE METER 
Clue: The meter of Shakespeare's sonnets, it's 10 syllables, unstressed-stressed-unstressed-etc.

iambic pentameter