CREATE TABLE "round_7" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: Which Away team score has a Venue of princes park?
SQL: SELECT "away_team_score" FROM "round_7" WHERE "venue"='princes park';

Question: Which Away team score has a Home team of melbourne?
SQL: SELECT "away_team_score" FROM "round_7" WHERE "home_team"='melbourne';