Question: Who is entered earlier than 1975 and has a Lotus 20 chassis?
SQL: SELECT "Entrant" FROM "2-1228291-1" WHERE "Year" < 1975.0 AND "Chassis" = 'Lotus 20';

Question: Which engine has a Lotus 49C chassis?
SQL: SELECT "Engine" FROM "2-1228291-1" WHERE "Chassis" = 'Lotus 49C';

Question: What are the average points of Scuderia Scribante with a Brabham BT11 chassis before 1968?
SQL: SELECT AVG("Points") FROM "2-1228291-1" WHERE "Entrant" = 'Scuderia Scribante' AND "Chassis" = 'Brabham BT11' AND "Year" < 1968.0;

Question: How many points are there for a mclaren m23 chassis later than 1972?
SQL: SELECT COUNT("Points") FROM "2-1228291-1" WHERE "Year" > 1972.0 AND "Chassis" = 'mclaren m23';