user: Question: Who is the driver with 58 laps and a grid smaller than 21?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Alain Prost', 'McLaren - TAG', 61.0, '1:41:26.115', 6.0]
SQL:

assistant: SELECT "Driver" FROM "Table" WHERE "Laps" = 58.0 AND "Grid" < 21.0;