What is the highest number of Silver, when the Nation is Japan (JPN), and when the Total is greater than 37?
CREATE TABLE "medal_count" (
  "rank" text,
  "nation" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT MAX("silver") FROM "medal_count" WHERE "nation"='japan (jpn)' AND "total">37;