CREATE TABLE "round_4" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: Who watches North Melbourne when they are away?
SQL: SELECT "crowd" FROM "round_4" WHERE "away_team"='north melbourne';

Question: What Away team is visiting Carlton?
SQL: SELECT "away_team" FROM "round_4" WHERE "home_team"='carlton';

Question: What team has Windy Hill as their home venue
SQL: SELECT "home_team_score" FROM "round_4" WHERE "venue"='windy hill';

Question: When richmond played away, what was the largest number of people who watched?
SQL: SELECT MAX("crowd") FROM "round_4" WHERE "away_team"='richmond';