Which silver has a Bronze of 1, a Total of 4, and a Nation of slovakia?
CREATE TABLE "medal_table" (
  "rank" text,
  "nation" text,
  "gold" text,
  "silver" text,
  "bronze" text,
  "total" text
);
SELECT "silver" FROM "medal_table" WHERE "bronze"='1' AND "total"='4' AND "nation"='slovakia';