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

### Instruction:
Name the average Against that has a Venue of twickenham , london on 25 november 1978?

### Inputs:
table_name: table, columns: ['Opposing Team', 'Against', 'Date', 'Venue', 'Status']

### Response:
SELECT AVG Against FROM table WHERE Venue = twickenham , london AND Date = 25 november 1978