What city or Raion (district) has 8,600 Bessarabian Bulgarians?
CREATE TABLE "ethnic_composition_of_budjak_according_t" (
  "raion_district_or_city" text,
  "total" text,
  "ukrainians" text,
  "moldovans" text,
  "bessarabian_bulgarians" text,
  "russians" text,
  "gagauzians" text,
  "other_ethnic_groups" text
);
SELECT "raion_district_or_city" FROM "ethnic_composition_of_budjak_according_t" WHERE "bessarabian_bulgarians"='8,600';