Table: t_1981_vfl_game
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: What did fitzroy score at their home game?
SQL: SELECT "home_team_score" FROM t_1981_vfl_game WHERE "home_team" = 'fitzroy'

Question: Which away team played at western oval?
SQL: SELECT "away_team" FROM t_1981_vfl_game WHERE "venue" = 'western oval'

Question: How big was the crowd when the opponent was essendon?
SQL: SELECT SUM("crowd") FROM t_1981_vfl_game WHERE "away_team" = 'essendon'