What was the away team when the home was st kilda?
CREATE TABLE "group_c" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "ground" text,
  "crowd" real,
  "date" text
);
SELECT "away_team" FROM "group_c" WHERE "home_team"='st kilda';