Which Grid did Alain Prost drive on?
CREATE TABLE table_name_39 (grid INTEGER, driver VARCHAR)
SELECT SUM(grid) FROM table_name_39 WHERE driver = "alain prost"
### Context: CREATE TABLE table_name_39 (grid INTEGER, driver VARCHAR) ### Question: Which Grid did Alain Prost drive on? ### Answer: SELECT SUM(grid) FROM table_name_39 WHERE driver = "alain prost"