What is the lowest number of sheep and goats after 1931, with fewer than 2518 cows and more than 2604.8 horses?
CREATE TABLE "ukrainian_ssr_livestock_thousand_head" (
  "year" real,
  "total_horses" real,
  "working_horses" text,
  "total_cattle" real,
  "oxen" real,
  "bulls" text,
  "cows" real,
  "pigs" real,
  "sheep_and_goats" real
);
SELECT MIN("sheep_and_goats") FROM "ukrainian_ssr_livestock_thousand_head" WHERE "year">1931 AND "cows"<2518 AND "total_horses">2604.8;