user: Question: Opponent of at boston patriots, and a Week larger than 3 had what average attendance?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Record', 'Game Site', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 20, 1970', 'at San Diego Chargers', 'W 16–14', '1–0', 'San Diego Stadium', 47782.0]
SQL:

assistant: SELECT AVG("Attendance") FROM "Table" WHERE "Opponent" = 'at boston patriots' AND "Week" > 3.0;