user: ### NOW ANSWER:
Question: What's the number of laps for 16 grids?
Columns: ['Rider', 'Manufacturer', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Lukáš Pešek', 'Derbi', 23.0, '38:03.020', 3.0]
SQL:

assistant: SELECT SUM("Laps") FROM "Table" WHERE "Grid" = 16.0;