user: Question: What is the Week of the game against Green Bay Packers?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 7, 2003', 'Arizona Cardinals', 'W 42-24', '60,691']
SQL:

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