What is number of silver for the country with more than 0 gold, rank of 14, and more than 4 bronze?
CREATE TABLE "medal_table" (
  "rank" text,
  "nation" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT COUNT("silver") FROM "medal_table" WHERE "gold">0 AND "rank"='14' AND "bronze">4;