user: Question: How many grids did Shinichi Nakatomi ride in?
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 COUNT("Grid") FROM "Table" WHERE "Rider" = 'Shinichi Nakatomi';