user: Question: What is pedro de la rosa's total number of Grid?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Mika Häkkinen', 'McLaren - Mercedes', 65.0, '1:33:55.390', 2.0]
SQL:

assistant: SELECT SUM("Grid") FROM "Table" WHERE "Driver" = 'pedro de la rosa';