user: Question: Which Grid did Alain Prost drive on?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Niki Lauda', 'McLaren - TAG', 79.0, '1:31:11.951', 9.0]
SQL:

assistant: SELECT "Grid" FROM "Table" WHERE "Driver" = 'Alain Prost';