CREATE TABLE "round_3" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: When did Geelong play as the home team?
SQL: SELECT "date" FROM "round_3" WHERE "home_team"='geelong';

Question: When North Melbourne played as the away team, what was the crowd numbers?
SQL: SELECT "crowd" FROM "round_3" WHERE "away_team"='north melbourne';