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: ROCKS & MINERALS 
Clue: A mixture containing antimony is sprayed on canvas to render it this

SOLUTION: fireproof

PROBLEM: Category: MONTREAL EXPOSE 
Clue: The Basilique Notre-Dame has one of the largest ones of these in North America; it weighs 12 tons

SOLUTION: bell

PROBLEM: Category: FUN AT THE BALLPARK 
Clue: In a 1983 game the presence of this substance on George Brett's bat caused controversy at Yankee Stadium

SOLUTION:
pine tar