CREATE TABLE "round_4" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: in a game against st kilda, what was the away team's score?
SQL: SELECT "away_team" FROM "round_4" WHERE "home_team"='st kilda';