What is the highest number of Silver medals with a Total greater than 14 and more than 15 Bronze medals?
CREATE TABLE "medal_table_by_country" (
  "rank" real,
  "nation" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT MAX("silver") FROM "medal_table_by_country" WHERE "total">14 AND "bronze">15;