Table: t_1977_vfl_match_8
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: Which away team played at MCG?
SQL: SELECT "away_team" FROM t_1977_vfl_match_8 WHERE "venue" = 'mcg'

Question: What was the date when Geelong was the home team?
SQL: SELECT "date" FROM t_1977_vfl_match_8 WHERE "home_team" = 'geelong'