In games where st kilda was the away team, what was the smallest crowd?
CREATE TABLE "round_10" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);
SELECT MIN("crowd") FROM "round_10" WHERE "away_team"='st kilda';