What is  the cat no for the label mute and the standard cd format?
CREATE TABLE "formats" (
  "release_format" text,
  "country" text,
  "label_s" text,
  "cat_no" text,
  "release_date" text
);
SELECT "cat_no" FROM "formats" WHERE "label_s"='mute' AND "release_format"='standard cd';