user: Question: What was the lowest attendance when the Green Bay Packers played?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 17, 1967', 'at St. Louis Cardinals', 'W 37–20', 40801.0]
SQL:

assistant: SELECT MIN("Attendance") FROM "Table" WHERE "Opponent" = 'Green Bay Packers';