user: ### NOW ANSWER:
Question: Count the Grid which has a Manufacturer of Aprilia, and a Rider of Bradley Smith?
Columns: ['Rider', 'Manufacturer', 'Laps', 'Time', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Stefan Bradl', 'Aprilia', 19.0, '41:05.176', 13.0]
SQL:

assistant: SELECT AVG("Grid") FROM "Table" WHERE "Manufacturer" = 'Aprilia' AND "Rider" = 'Bradley Smith';