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

### Instruction:
What is the maximum number of points against when the attendance was 47678?

### Inputs:
table_name: table, columns: ['Week', 'Date', 'Result', 'Record', 'Opponent', 'Points For', 'Points Against', 'First Downs', 'Attendance']

### Response:
SELECT MAX Points Against FROM table WHERE Attendance = 47678