Table: t_1948_vfl_football
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: What day did North Melbourne play as the home team?
SQL: SELECT "date" FROM t_1948_vfl_football WHERE "home_team" = 'north melbourne'

Question: Who was the away team at Arden Street Oval?
SQL: SELECT "away_team" FROM t_1948_vfl_football WHERE "venue" = 'arden street oval'