In what format was the release that was dated 7 April 2003 from catalog 584 2112?
CREATE TABLE "release_history" (
  "country" text,
  "date" text,
  "label" text,
  "format" text,
  "catalog" text
);
SELECT "format" FROM "release_history" WHERE "date"='7 april 2003' AND "catalog"='584 2112';