Table: t_1926_vfl_game_4
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: What is the date of the game where Richmond was the away team?
SQL: SELECT "date" FROM t_1926_vfl_game_4 WHERE "away_team" = 'richmond'

Question: Who was the home team when Carlton was the away team?
SQL: SELECT "home_team" FROM t_1926_vfl_game_4 WHERE "away_team" = 'carlton'