CREATE TABLE "round_18" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: Who is the away side at windy hill?
SQL: SELECT "away_team" FROM "round_18" WHERE "venue"='windy hill';

Question: Who is the home side when the away side scores 11.15 (81)?
SQL: SELECT "home_team" FROM "round_18" WHERE "away_team_score"='11.15 (81)';