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.

[Q]: Category: IN THE NEWS 
Clue: In 1951 Elizabeth II attended one of these in Canada; she attended her next one, also in Canada, on October 6, 2002
[A]: hockey game


[Q]: Category: SISTER CITIES 
Clue: San Francisco, California is a sister city to this one in Italy
[A]: assisi


[Q]: Category: THE POST OFFICE 
Clue: Due to demand Bugs Bunny's U.S. commemorative stamp was the first to have a second printing since this one
[A]:
the elvis presley stamp