user: Question: What date was the record 21-11?
Columns: ['Game', 'Date', 'Opponent', 'Score', 'Location Attendance', 'Record']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['28', 'January 3', 'at New Jersey Nets', 'W 95-85', 'Continental Airlines Arena 14,310', '17-11']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Record" = '21-11';