SCHEMA:
CREATE TABLE table_name_65 (year INTEGER, event VARCHAR, championship VARCHAR, nation VARCHAR, result VARCHAR)
USER:
What year did Canada get a silver in the olympics in the Men's Coxless Pair event?

QUERY:
SELECT MIN(year) FROM table_name_65 WHERE nation = "canada" AND result = "silver" AND championship = "olympics" AND event = "men's coxless pair"