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: When the home team score was 21.15 (141), what was the away team?
SQL: SELECT "away_team" FROM "round_15" WHERE "home_team_score"='21.15 (141)';

Question: When the away team score was 11.5 (71), what was the date?
SQL: SELECT "date" FROM "round_15" WHERE "away_team_score"='11.5 (71)';

Question: When the away team was geelong, what was the away team score?
SQL: SELECT "away_team_score" FROM "round_15" WHERE "away_team"='geelong';

Question: When the away team was north melbourne, what was the away team score?
SQL: SELECT "away_team_score" FROM "round_15" WHERE "away_team"='north melbourne';