CREATE TABLE table_1569625_1 (tournament VARCHAR(255), margin_of_victory VARCHAR(255), winning_score VARCHAR(255))
Name the tournament when margin of victory is 3 strokes and winning score is 71-66-70-67=274
    
SQL: SELECT tournament FROM table_1569625_1 WHERE margin_of_victory = "3 strokes" AND winning_score = 71 - 66 - 70 - 67 = 274