user: Question: What is the lowest attendance when the Atlanta Falcons were the opponent?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 7, 1986', 'at Tampa Bay Buccaneers', 'W 31-7', 50780.0]
SQL:

assistant: SELECT MIN("Week") FROM "Table" WHERE "Opponent" = 'Atlanta Falcons';