Name the country for 11,891 area
CREATE TABLE "provinces_since_the_division_of_korea" (
  "rr_romaja" text,
  "m_r_romaja" text,
  "hangul_chosongul" text,
  "hanja" text,
  "iso" text,
  "area" text,
  "capital" text,
  "region" text,
  "country" text
);
SELECT "country" FROM "provinces_since_the_division_of_korea" WHERE "area"='11,891';