user: Question: Who was driving with a Grid of 13?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Jackie Stewart', 'Matra - Ford', 68.0, '1:39:11.26', 3.0]
SQL:

assistant: SELECT "Driver" FROM "Table" WHERE "Grid" = 13.0;