What is the output of the engine AEX/APQ that uses petrol?
CREATE TABLE "engines" (
  "name" text,
  "volume" text,
  "engine" text,
  "fuel" text,
  "output" text,
  "torque" text,
  "engine_id_code_s" text,
  "0_100km_h_s" real,
  "top_speed" text,
  "years" text
);
SELECT "output" FROM "engines" WHERE "fuel"='petrol' AND "engine_id_code_s"='aex/apq';