Table: vfl_1981_game_4
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: What was the date of the game at MCG?
SQL: SELECT "date" FROM vfl_1981_game_4 WHERE "venue" = 'mcg'

Question: What was the date of the game where Geelong was the home team?
SQL: SELECT "date" FROM vfl_1981_game_4 WHERE "home_team" = 'geelong'

Question: What was the crowd size for the game where Footscray was the away team?
SQL: SELECT COUNT("crowd") FROM vfl_1981_game_4 WHERE "away_team" = 'footscray'