user: Question: Which venue had an against score smaller than 18 when the opposing team was North Auckland?
Columns: ['Opposing Team', 'Against', 'Date', 'Venue', 'Status']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['North Auckland', 14.0, '18/05/1985', 'Okara Park , Whangarei', 'Tour Match']
SQL:

assistant: SELECT "Venue" FROM "Table" WHERE "Against" < 18.0 AND "Opposing Team" = 'North Auckland';