user: ### NOW ANSWER:
Question: I want the lowest points diff for against being less than 578 and lost being 15 and points more than 26
Columns: ['Team', 'Played', 'Drawn', 'Lost', 'Against', 'Points Diff', 'Points']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: ['St Helens', 28.0, 0.0, 4.0, 430.0, 509.0, 48.0]
SQL:

assistant: SELECT MIN("Points Diff") FROM "Table" WHERE "Against" < 578.0 AND "Lost" = 15.0 AND "Points" > 26.0;