What is the displacement when the fuel system is carburettor, and a power of ps (kw; hp), and also has a model of 2000?
CREATE TABLE "engines" (
  "model" text,
  "years" text,
  "engine" text,
  "displacement" text,
  "power" text,
  "fuel_system" text
);
SELECT "displacement" FROM "engines" WHERE "fuel_system"='carburettor' AND "power"='ps (kw; hp)' AND "model"='2000';