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

Question: What is the average Year when there was a cosworth straight-4 engine, and the Entrant was ron harris / team lotus?
SQL: SELECT AVG("year") FROM "complete_formula_one_world_championship_" WHERE "engine"='cosworth straight-4' AND "entrant"='ron harris / team lotus';

Question: What is the name of the Entrant that has a Chassis of lotus 25
SQL: SELECT "entrant" FROM "complete_formula_one_world_championship_" WHERE "chassis"='lotus 25';

Question: What was the engine when the chassis was a porsche 718??
SQL: SELECT "engine" FROM "complete_formula_one_world_championship_" WHERE "chassis"='porsche 718';

Question: What is the number of points when there was a BMW 269 F2 chassis earlier than 1969?
SQL: SELECT COUNT("points") FROM "complete_formula_one_world_championship_" WHERE "chassis"='bmw 269 f2' AND "year"<1969;

Question: What engine was in the lotus 44 f2 Chassis?
SQL: SELECT "engine" FROM "complete_formula_one_world_championship_" WHERE "chassis"='lotus 44 f2';

Question: What year was there a lotus 25 Chassis?
SQL: SELECT "year" FROM "complete_formula_one_world_championship_" WHERE "chassis"='lotus 25';