Table: t_1931_vfl_game
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: What was the away team's score at Princes Park?
SQL: SELECT "away_team" FROM t_1931_vfl_game WHERE "venue" = 'princes park'

Question: When did Richmond play an away game against Collingwood?
SQL: SELECT "date" FROM t_1931_vfl_game WHERE "away_team" = 'richmond'