user: Question: What is the average Against, when Status is "2007 Rugby World Cup", and when Opposing Teams is "U.S.A."?
Columns: ['Opposing Teams', 'Against', 'Date', 'Venue', 'Status']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Scotland', 20.0, '03/02/2007', 'Twickenham , London', 'Six Nations']
SQL:

assistant: SELECT AVG("Against") FROM "Table" WHERE "Status" = '2007 Rugby World Cup' AND "Opposing Teams" = 'U.S.A.';