user: Question: Name the winning score for PGA Championship
Columns: ['Year', 'Championship', '54 holes', 'Winning score', 'Margin', 'Runner(s)-up']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1922.0, 'U.S. Open', '4 shot deficit', '+8 (72-73-75-68=288)', '1 stroke', 'Bobby Jones']
SQL:

assistant: SELECT "Winning score" FROM "Table" WHERE "Championship" = 'PGA Championship';