Who was the special guest when the category was vocal groups and the name was Romantic?
CREATE TABLE "contestants_and_final_ranking" (
  "name" text,
  "category" text,
  "eliminated" text,
  "date" text,
  "special_guest" text
);
SELECT "special_guest" FROM "contestants_and_final_ranking" WHERE "category"='vocal groups' AND "name"='romantic';