Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Opponent of at boston patriots, and a Week larger than 3 had what average attendance?

### Inputs:
table_name: table, columns: ['Week', 'Date', 'Opponent', 'Result', 'Record', 'Game Site', 'Attendance']

### Response:
SELECT AVG Attendance FROM table WHERE Opponent = at boston patriots AND Week > 3