user: ### NOW ANSWER:
Question: What is the grid number for troy corser with under 22 laps?
Columns: ['Rider', 'Bike', 'Laps', 'Time', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Troy Bayliss', 'Ducati 999 F07', 22.0, '36:54.133', 3.0]
SQL:

assistant: SELECT SUM("Grid") FROM "Table" WHERE "Rider" = 'troy corser' AND "Laps" < 22.0;