user: Question: What kind of  Manufacturer has a Laps smaller than 20 and a Grid of 21
Columns: ['Rider', 'Manufacturer', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Mattia Pasini', 'Aprilia', 20.0, '40:16.202', 5.0]
SQL:

assistant: SELECT "Manufacturer" FROM "Table" WHERE "Laps" < 20.0 AND "Grid" = 21.0;