user: Question: What was the winning score of the Valero Texas Open?
Columns: ['Date', 'Tournament', 'Winning score', 'Margin of victory', 'Runner(s)-up']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Aug 4, 1996', 'Buick Open', '–22 (65-64-69-68=266)', '5 strokes', 'Chip Beck']
SQL:

assistant: SELECT "Winning score" FROM "Table" WHERE "Tournament" = 'Valero Texas Open';