Question: what is the least laps when the driver is rolf stommelen and the grid is more than 18?
SQL: SELECT MIN("Laps") FROM "2-1122491-1" WHERE "Driver" = 'rolf stommelen' AND "Grid" > 18.0;

Question: what is the most laps with a grid of 20?
SQL: SELECT MAX("Laps") FROM "2-1122491-1" WHERE "Grid" = 20.0;