user: Question: Which Grid has a Driver of Johnny Dumfries?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Nigel Mansell', 'Williams - Honda', 70.0, '1:37:21.900', 2.0]
SQL:

assistant: SELECT "Grid" FROM "Table" WHERE "Driver" = 'Johnny Dumfries';