user: Question: Attendance of 60671 had what average week?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Venue', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 16, 1962', 'Minnesota Vikings', 'W 34-7', 'City Stadium', 38669.0]
SQL:

assistant: SELECT AVG("Week") FROM "Table" WHERE "Attendance" = 60671.0;