What year was the Grand Prix with an i8 engine and a cc displacement of 1500?
CREATE TABLE "racing_vehicles" (
  "model" text,
  "year" text,
  "type" text,
  "engine" text,
  "displacement_cc" text
);
SELECT "year" FROM "racing_vehicles" WHERE "type"='grand prix' AND "engine"='i8' AND "displacement_cc"='1500';