Table: t_1967_vfl_match
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: Who was Carlton's home team opponent?
SQL: SELECT "home_team" FROM t_1967_vfl_match WHERE "away_team" = 'carlton'

Question: Who was the away team at Lake Oval?
SQL: SELECT "away_team_score" FROM t_1967_vfl_match WHERE "venue" = 'lake oval'

Question: Who was South Melbourne's away team opponent?
SQL: SELECT "away_team" FROM t_1967_vfl_match WHERE "home_team" = 'south melbourne'