user: Question: What is the lowest Lost for são paulo railway, Points more than 21?
Columns: ['Position', 'Team', 'Points', 'Played', 'Drawn', 'Lost', 'Against', 'Difference']
Types: ['real', 'text', 'real', 'real', 'real', 'real', 'real', 'text']
Sample row: [1.0, 'Palmeiras', 32.0, 20.0, 2.0, 3.0, 19.0, '31']
SQL:

assistant: SELECT MIN("Lost") FROM "Table" WHERE "Team" = 'são paulo railway' AND "Points" > 21.0;