user: Question: Which Date has a Winning score of –14 (66-64-68-68=266)?
Columns: ['Date', 'Tournament', 'Winning score', 'Margin of victory', 'Runner(s)-up']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Apr 29, 1984', 'Houston Coca-Cola Open', '–10 (70-68-68-68=274)', '1 stroke', 'Buddy Gardner']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Winning score" = '–14 (66-64-68-68=266)';