Table: vfl_1980_game_5
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: Who was the home team at MCG?
SQL: SELECT "home_team" FROM vfl_1980_game_5 WHERE "venue" = 'mcg'

Question: Who was Carlton's away team opponents?
SQL: SELECT "away_team" FROM vfl_1980_game_5 WHERE "home_team" = 'carlton'

Question: What was home team South Melbourne's opponents score?
SQL: SELECT "away_team_score" FROM vfl_1980_game_5 WHERE "home_team" = 'south melbourne'