Question: What is the average grid number for cars that retired due to engine failure before 18 laps?
SQL: SELECT AVG("Grid") FROM "2-1122400-1" WHERE "Time/Retired" = 'engine' AND "Laps" < 18.0;

Question: What is the time/retired for Jo Siffert with a grid under 11?
SQL: SELECT "Time/Retired" FROM "2-1122400-1" WHERE "Grid" < 11.0 AND "Driver" = 'Jo Siffert';

Question: What driver has under 19 laps and a grid under 10?
SQL: SELECT "Driver" FROM "2-1122400-1" WHERE "Laps" < 19.0 AND "Grid" < 10.0;