user: Question: What is the average goals for that has +40 as the goals difference, with points 1 greater than 55?
Columns: ['Position', 'Team', 'Played', 'Drawn', 'Lost', 'Goals For', 'Goals Against', 'Goal Difference', 'Points 1']
Types: ['real', 'text', 'real', 'real', 'real', 'real', 'real', 'text', 'real']
Sample row: [1.0, 'Runcorn', 42.0, 7.0, 3.0, 99.0, 22.0, '+77', 71.0]
SQL:

assistant: SELECT AVG("Goals For") FROM "Table" WHERE "Goal Difference" = '+40' AND "Points 1" > 55.0;