What is the rank of Club Valencia with a U-17 Caps of 20?
CREATE TABLE "top_appearances" (
  "rank" real,
  "player" text,
  "club_s" text,
  "year_s" text,
  "u_17_caps" real
);
SELECT COUNT("rank") FROM "top_appearances" WHERE "club_s"='valencia' AND "u_17_caps"=20;