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

### Instruction:
What is the average Against, when Status is "2007 Rugby World Cup", and when Opposing Teams is "U.S.A."?

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

### Response:
SELECT AVG Against FROM table WHERE Status = 2007 rugby world cup AND Opposing Teams = u.s.a.