Table: t_1968_vfl_match_4
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: What is the crowd size of the Away team, Fitzroy?
SQL: SELECT "crowd" FROM t_1968_vfl_match_4 WHERE "away_team" = 'fitzroy'

Question: Which Away team uses Princes Park as it's venue?
SQL: SELECT "away_team" FROM t_1968_vfl_match_4 WHERE "venue" = 'princes park'

Question: What was the lowest Crowd Size for the Home Team of North Melbourne?
SQL: SELECT MIN("crowd") FROM t_1968_vfl_match_4 WHERE "home_team" = 'north melbourne'