user: Question: Which Date has a Tournament of AT&T Pebble Beach National Pro-Am, and a Margin of victory of 1 stroke, and a To par of –11?
Columns: ['Date', 'Tournament', 'Winning score', 'To par', 'Margin of victory']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Sep 16, 1984', 'Greater Milwaukee Open', '67-68-69-68=272', '–16', '5 strokes']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Tournament" = 'AT&T Pebble Beach National Pro-Am' AND "Margin of victory" = '1 stroke' AND "To par" = '–11';