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

Question: What did the home team score at MCG?
SQL: SELECT "home_team_score" FROM t_1968_vfl_match WHERE "venue" = 'mcg'

Question: What did the away team score when playing South Melbourne?
SQL: SELECT "away_team_score" FROM t_1968_vfl_match WHERE "home_team" = 'south melbourne'

Question: When did the game with North Melbourne as the away team take place?
SQL: SELECT "date" FROM t_1968_vfl_match WHERE "away_team" = 'north melbourne'