CREATE TABLE "round_9" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: When was the game played at Princes Park?
SQL: SELECT "date" FROM "round_9" WHERE "venue"='princes park';

Question: What did Melbourne score as the home team?
SQL: SELECT "home_team_score" FROM "round_9" WHERE "home_team"='melbourne';