CREATE TABLE table_52986 ("Driver" CLOB, "Constructor" CLOB, "Laps" FLOAT, "Time/Retired" CLOB, "Grid" FLOAT)

Which Grid did Alain Prost drive on?
SELECT SUM("Grid") FROM table_52986 WHERE "Driver" = 'alain prost'
SELECT SUM("Grid") FROM "table_52986" WHERE "Driver" = 'alain prost'