instruction:
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.
question:
Category: CLASSICAL MYTHOLOGY 
Clue: Achilles died after one of these weapons wounded him in the heel
answer:
an arrow


question:
Category: ENGLISH USAGE 
Clue: Latin for "thus", this 3-letter word is put in brackets to indicate an error in a quote
answer:
sic


question:
Category: OPERA 
Clue: Meyerbeer's "Les Huguenots" revolves around this 1572 massacre of the Huguenots
answer:

the st. bartholomew\'s day massacre