user: Question: What is the total against on 15/10/1999?
Columns: ['Opposing Teams', 'Against', 'Date', 'Venue', 'Status']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Scotland', 21.0, '20/02/1999', 'Twickenham , London', 'Five Nations']
SQL:

assistant: SELECT SUM("Against") FROM "Table" WHERE "Date" = '15/10/1999';