CREATE TABLE "complete_formula_one_world_championship_" (
  "year" real,
  "entrant" text,
  "chassis" text,
  "engine" text,
  "points" real
);

Question: What was the engine of the Hoover Motor Express after 1955 with greater than 0 points?
SQL: SELECT "engine" FROM "complete_formula_one_world_championship_" WHERE "year">1955 AND "points">0 AND "entrant"='hoover motor express';

Question: What is the average year that the Belanger Motors had an Offenhauser l4 engine?
SQL: SELECT AVG("year") FROM "complete_formula_one_world_championship_" WHERE "engine"='offenhauser l4' AND "entrant"='belanger motors';