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: 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: RANKS & TITLES 
Clue: Inheriting property & title from her deceased husband made Tz'u-hsi of China this kind of Empress

SOLUTION: dowager

PROBLEM: Category: NAMED AFTER JFK 
Clue: Located in Queens, it first opened to commercial traffic in July 1948

SOLUTION:
jfk airport