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 simplicity, answers should be in all lower cased letters.
PROBLEM: Category: U.S. STAMPS
Clue: FDR's in 1982 was the last stamp to show 1 of these; they were removed from photos of Jackson Pollock & Edward R. Murrow

SOLUTION: cigarette

PROBLEM: 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

SOLUTION: hockey game

PROBLEM: Category: SPORTS HISTORY
Clue: In a famous incident, it's the school at which William Webb Ellis disregarded the rules in 1823

SOLUTION:
rugby