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.

[EX Q]: Category: BELGIUM, BELARUS OR BELIZE 
Clue: It's part of the British Commonwealth of Nations
[EX A]: belize

[EX Q]: Category: WINE 
Clue: The Douro Valley in this country is an important port producer
[EX A]: portugal

[EX Q]: Category: GLASS & GLASSMAKING 
Clue: The largest hand-blown one of these, with 117 hand-blown figures, is in a cathedral in Kentucky
[EX A]:
a stained-glass window