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

Question: What year has an ERA engine and an ERA A-type chassis?
SQL: SELECT "year" FROM "complete_formula_one_world_championship_" WHERE "engine"='era' AND "chassis"='era a-type';

Question: What is the earliest year that has a Bristol engine?
SQL: SELECT MIN("year") FROM "complete_formula_one_world_championship_" WHERE "engine"='bristol';