user: Question: What is the highest goals against when points are larger than 31, the goal difference is smaller than 9, wins are 13, and draws are larger than 6?
Columns: ['Position', 'Club', 'Played', 'Points', 'Wins', 'Draws', 'Losses', 'Goals for', 'Goals against', 'Goal Difference']
Types: ['real', 'text', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Deportivo de La Coruña', 30.0, 43.0, 18.0, 7.0, 5.0, 53.0, 19.0, 34.0]
SQL:

assistant: SELECT MAX("Goals against") FROM "Table" WHERE "Points" > 31.0 AND "Goal Difference" < 9.0 AND "Wins" = 13.0 AND "Draws" > 6.0;