Which Chassis has an Entrant of cooper car company, and a Year of 1963?
CREATE TABLE "complete_formula_one_world_championship_" (
  "year" real,
  "entrant" text,
  "chassis" text,
  "engine" text,
  "points" real
);
SELECT "chassis" FROM "complete_formula_one_world_championship_" WHERE "entrant"='cooper car company' AND "year"=1963;