When mithuna is the   international alphabet of sanskrit transliteration what is the ruling planet?
CREATE TABLE "r_i_zodiacal_signs" (
  "number" real,
  "sanskrit" text,
  "international_alphabet_of_sanskrit_transliteration" text,
  "sanskrit_gloss" text,
  "western_name" text,
  "greek" text,
  "gloss" text,
  "tattva_element" text,
  "quality" text,
  "ruling_planet" text
);
SELECT "ruling_planet" FROM "r_i_zodiacal_signs" WHERE "international_alphabet_of_sanskrit_transliteration"='Mithuna';