What is the total number of gold medals Egypt, who has less than 0 silver, has?
CREATE TABLE "medal_table" (
  "rank" text,
  "nation" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT COUNT("gold") FROM "medal_table" WHERE "nation"='egypt' AND "silver"<0;