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

### Instruction:
What was the highest week with a w 21-17 result, and more than 45,254 in attendance?

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

### Response:
SELECT MAX Week FROM table WHERE Result = w 21-17 AND Attendance > 45,254