What is the most reduced Margin that has a St Kilda Saints of 11.13 (79)?
CREATE TABLE "home_and_away_rounds" (
  "round" text,
  "st_kilda_saints" text,
  "opposition" text,
  "their_score" text,
  "margin" real
);
SELECT MIN("margin") FROM "home_and_away_rounds" WHERE "st_kilda_saints"='11.13 (79)';