user: Question: What was the winning score when there were 9 strokes advantage?
Columns: ['Date', 'Tournament', 'Winning score', 'Margin of victory', 'Runner(s)-up']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Jul 8, 1962', 'Kelly Girls Open', '–7 (73-73-69=215)', '1 stroke', 'Sandra Haynie']
SQL:

assistant: SELECT "Winning score" FROM "Table" WHERE "Margin of victory" = '9 strokes';