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

Question: What year did the Cosworth v8 engine participate in?
SQL: SELECT AVG("year") FROM "complete_formula_one_world_championship_" WHERE "engine"='cosworth v8';

Question: Which year did the team receive more than 0 points?
SQL: SELECT AVG("year") FROM "complete_formula_one_world_championship_" WHERE "points">0;

Question: Which chassis was used in 1971?
SQL: SELECT "chassis" FROM "complete_formula_one_world_championship_" WHERE "year"=1971;