user: Question: What's the week when the green bay packers were the opponent and less than 57966 were in attendance?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 16, 1962', 'Pittsburgh Steelers', 'W 45-7', 46641.0]
SQL:

assistant: SELECT "Week" FROM "Table" WHERE "Attendance" < 57966.0 AND "Opponent" = 'green bay packers';