what is the highest silver when the total is 4 and bronze is less than 1?
CREATE TABLE "world_championships_total_medals" (
  "rank" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" text
);
SELECT MAX("silver") FROM "world_championships_total_medals" WHERE "total"='4' AND "bronze"<1;