What division has a Rank in Respective Divisions of 5, and is the Altrincham club?
CREATE TABLE "existing_stadiums" (
  "stadium" text,
  "capacity" text,
  "club" text,
  "division" text,
  "rank_in_respective_divisions" text
);
SELECT "division" FROM "existing_stadiums" WHERE "rank_in_respective_divisions"='5' AND "club"='altrincham';