user: Question: What is the average wins with a 20th position and more than 0 f/laps?
Columns: ['Season', 'Series', 'Team', 'Races', 'Wins', 'Poles', 'F/Laps', 'Points', 'Position']
Types: ['real', 'text', 'text', 'real', 'real', 'real', 'real', 'real', 'text']
Sample row: [2003.0, 'British Formula Renault 2.0 (Winter Series)', 'Manor Motorsport', 3.0, 0.0, 0.0, 0.0, 3.0, '22nd']
SQL:

assistant: SELECT AVG("Wins") FROM "Table" WHERE "Position" = '20th' AND "F/Laps" > 0.0;