What is the average rank of west germany (frg), which has more than 1 silver, less than 11 gold, and 2 bronze medals?
CREATE TABLE "medal_table" (
  "rank" real,
  "nation" text,
  "gold" real,
  "silver" real,
  "bronze" real,
  "total" real
);
SELECT AVG("rank") FROM "medal_table" WHERE "silver">1 AND "gold"<11 AND "bronze"=2 AND "nation"='west germany (frg)';