user: Question: What is the highest goals against that has 15 as position?
Columns: ['Position', 'Team', 'Played', 'Drawn', 'Lost', 'Goals For', 'Goals Against', 'Goal Difference', 'Points 1']
Types: ['real', 'text', 'real', 'real', 'real', 'real', 'real', 'text', 'text']
Sample row: [1.0, 'Stalybridge Celtic', 38.0, 8.0, 4.0, 81.0, 30.0, '+51', '60']
SQL:

assistant: SELECT MAX("Goals Against") FROM "Table" WHERE "Position" = 15.0;