user: Question: On what date was the result W 28–7?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Game site', 'Record', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 3', 'Oakland Raiders', 'W 14–6', 'Mile High Stadium', '1–0', 75092.0]
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Result" = 'W 28–7';