user: ### NOW ANSWER:
Question: What is the car number for driver Hélio Castroneves
Columns: ['Fin. Pos', 'Car No.', 'Driver', 'Team', 'Laps', 'Time/Retired', 'Grid', 'Laps Led', 'Points']
Types: ['real', 'real', 'text', 'text', 'real', 'text', 'real', 'real', 'text']
Sample row: [1.0, 11.0, 'Tony Kanaan', 'Andretti Green', 225.0, '1:47:42.4393', 3.0, 25.0, '50']
SQL:

assistant: SELECT MIN("Car No.") FROM "Table" WHERE "Driver" = 'Hélio Castroneves';