What company constructed the vehicle in the location not held in 1933?
CREATE TABLE "winners_of_the_moroccan_grand_prix" (
  "year" text,
  "driver" text,
  "constructor" text,
  "category" text,
  "location" text,
  "report" text
);
SELECT "constructor" FROM "winners_of_the_moroccan_grand_prix" WHERE "location"='not held' AND "year"='1933';