user: Question:  what's the championship where winning score is −12 (74-66-65-71=276)
Columns: ['Year', 'Championship', '54 holes', 'Winning score', 'Margin', 'Runner(s)-up']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1997.0, 'Masters Tournament', '9 shot lead', '−18 (70-66-65-69=270)', '12 strokes', 'Tom Kite']
SQL:

assistant: SELECT "Championship" FROM "Table" WHERE "Winning score" = '−12 (74-66-65-71=276)';