Table: t_1968_vfl_match
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: With a North Melbourne away team, what is the average crowd?
SQL: SELECT AVG("crowd") FROM t_1968_vfl_match WHERE "away_team" = 'north melbourne'

Question: Which venue does Fitzroy play as an away team?
SQL: SELECT "venue" FROM t_1968_vfl_match WHERE "away_team" = 'fitzroy'

Question: In the game at Glenferrie Oval, what is the home team score?
SQL: SELECT "home_team_score" FROM t_1968_vfl_match WHERE "venue" = 'glenferrie oval'

Question: In the game against Essendon at home, what did the away team score?
SQL: SELECT "away_team_score" FROM t_1968_vfl_match WHERE "home_team" = 'essendon'