user: Question: When did Final Score of 31-7 happen?
Columns: ['Date', 'Visiting Team', 'Final Score', 'Host Team', 'Stadium']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['September 3', 'Tennessee Titans', '13-16', 'Buffalo Bills', 'Ralph Wilson Stadium']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Final Score" = '31-7';