Table: t_1967_vfl_football
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: Who was the away team at mcg?
SQL: SELECT "away_team" FROM t_1967_vfl_football WHERE "venue" = 'mcg'

Question: Who was the home team at princes park?
SQL: SELECT "home_team" FROM t_1967_vfl_football WHERE "venue" = 'princes park'