user: Question: Name the date for result Loss for Duke
Columns: ['Game', 'Date', 'Opponent', 'Result', 'Black Knights points', 'Opponents', 'Record']
Types: ['real', 'text', 'text', 'text', 'real', 'real', 'text']
Sample row: [1.0, 'Sept. 13', 'Holy Cross', 'Win', 44.0, 7.0, '1-0']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Result" = 'Loss' AND "Opponent" = 'Duke';