user: Question: What was the lowest draw when the against was larger than 2638?
Columns: ['Golden Rivers', 'Wins', 'Byes', 'Losses', 'Draws', 'Against']
Types: ['text', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Wandella', 15.0, 2.0, 1.0, 0.0, 813.0]
SQL:

assistant: SELECT MIN("Draws") FROM "Table" WHERE "Against" > 2638.0;