CREATE TABLE "round_15" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: What was the crowd when the home team had a score of 16.21 (117)?
SQL: SELECT "crowd" FROM "round_15" WHERE "home_team_score"='16.21 (117)';

Question: What was the home team's score at kardinia park?
SQL: SELECT "home_team_score" FROM "round_15" WHERE "venue"='kardinia park';

Question: What is the venue when melbourne is the away team?
SQL: SELECT "venue" FROM "round_15" WHERE "away_team"='melbourne';