Question: What is the average points that Centro Asegurador earned with the McLaren M23 chassis?
SQL: SELECT AVG("Points") FROM "2-1228326-1" WHERE "Chassis" = 'McLaren M23' AND "Entrant" = 'Centro Asegurador';

Question: What was the chassis of Emilio de Villota in 1981?
SQL: SELECT "Chassis" FROM "2-1228326-1" WHERE "Year" > 1981.0;