user: Question: What was the winning score on Aug 21, 1977?
Columns: ['Date', 'Tournament', 'Winning Score', 'Margin of Victory', 'Runner(s)-up']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['May 1, 1977', 'Birmingham Classic', '-9 (68-69-70=207)', '1 stroke', 'Debbie Massey']
SQL:

assistant: SELECT "Winning Score" FROM "Table" WHERE "Date" = 'Aug 21, 1977';