What is the most silver medals when the total is less than 4 and the rank is 12?
CREATE TABLE "medal_count" (
  "rank" text,
  "nation" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT MAX("silver") FROM "medal_count" WHERE "total"<4 AND "rank"='12';