user: Question: What is the high goal against associated with 18 wins, a Goal Difference of 43, and under 6 draws?
Columns: ['Position', 'Club', 'Played', 'Wins', 'Draws', 'Losses', 'Goals for', 'Goals against', 'Points', 'Goal Difference']
Types: ['real', 'text', 'real', 'real', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'FK Ventspils', 28.0, 18.0, 6.0, 4.0, 59.0, 16.0, 60.0, 43.0]
SQL:

assistant: SELECT MAX("Goals against") FROM "Table" WHERE "Wins" = 18.0 AND "Goal Difference" = 43.0 AND "Draws" < 6.0;