user: Question: What was the winning score in the PGA Championship?
Columns: ['Year', 'Championship', '54 holes', 'Winning score', 'Margin']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1. 1962', 'U.S. Open', '2 shot deficit', '−1 (72-70-72-69=283)', 'Playoff 1']
SQL:

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