Table: t_1942_vfl_football_games_4
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: Who was Richmond's home team opponent?
SQL: SELECT "home_team" FROM t_1942_vfl_football_games_4 WHERE "away_team" = 'richmond'

Question: Where did Essendon play as the away team?
SQL: SELECT "venue" FROM t_1942_vfl_football_games_4 WHERE "away_team" = 'essendon'