user: Question: What is the grid total for Alain Prost with over 14 laps?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Ayrton Senna', 'Lotus - Renault', 72.0, '1:48:47.735', 1.0]
SQL:

assistant: SELECT SUM("Grid") FROM "Table" WHERE "Laps" > 14.0 AND "Driver" = 'Alain Prost';