Silver larger than 0, and a Total smaller than 3, and a Nation of bulgaria, and a Bronze smaller than 0 had what sum of gold?
CREATE TABLE "medal_table" (
  "nation" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT SUM("gold") FROM "medal_table" WHERE "silver">0 AND "total"<3 AND "nation"='bulgaria' AND "bronze"<0;