user: Question: How many lost when goals for is 43 and the position number is higher than 15?
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, 'Gateshead', 42.0, 10.0, 8.0, 85.0, 51.0, '+34', '82']
SQL:

assistant: SELECT SUM("Lost") FROM "Table" WHERE "Goals For" = 43.0 AND "Position" > 15.0;