user: Question: What is the total number of Grid, when Rider is aleix espargaro?
Columns: ['Rider', 'Manufacturer', 'Laps', 'Time', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Alvaro Bautista', 'Aprilia', 26.0, '44:34.257', 2.0]
SQL:

assistant: SELECT SUM("Grid") FROM "Table" WHERE "Rider" = 'aleix espargaro';