CREATE TABLE "round_20" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: Which team plays at the Arden Street Oval?
SQL: SELECT "away_team" FROM "round_20" WHERE "venue"='arden street oval';

Question: Where does Carlton play?
SQL: SELECT "venue" FROM "round_20" WHERE "home_team"='carlton';