user: Question: How many weeks had the Green Bay Packers as opponents?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 12, 2004', 'at Chicago Bears', 'W 20-16', '61,535']
SQL:

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