user: Question: What is Fonsi Nieto's average grid when he's riding a Suzuki GSX-R1000?
Columns: ['Rider', 'Bike', 'Laps', 'Time', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Troy Bayliss', 'Ducati 1098 F08', 22.0, '36:50.907', 1.0]
SQL:

assistant: SELECT AVG("Grid") FROM "Table" WHERE "Bike" = 'Suzuki GSX-R1000' AND "Rider" = 'Fonsi Nieto';