user: Question: What's the least amount of goals for a game that had a tied bigger than 15?
Columns: ['Season', 'Games', 'Lost', 'Tied', 'Points', 'Goals for', 'Goals against', 'Standing']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'real', 'text']
Sample row: ['1994–95', 80.0, 45.0, 11.0, 59.0, 234.0, 300.0, '6th, North']
SQL:

assistant: SELECT MIN("Goals for") FROM "Table" WHERE "Tied" > 15.0;