user: Question: What was the earliest week when the New Orleans Saints were the opponents?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'TV Time', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'August 31, 1997', 'at Tennessee Oilers', 'L 24–21', 'NBC 10:00am', '30,171']
SQL:

assistant: SELECT MIN("Week") FROM "Table" WHERE "Opponent" = 'New Orleans Saints';