user: Question: How many drivers on the grid are called Vitor Meira?
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', 200.0, '2:49:38.0509', 8.0, 29.0, '50']
SQL:

assistant: SELECT COUNT("Grid") FROM "Table" WHERE "Driver" = 'Vitor Meira';