Table: t_1934_vfl_match
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: When did an away team have a score of 12.9 (81)?
SQL: SELECT "date" FROM t_1934_vfl_match WHERE "away_team_score" = '12.9 (81)'

Question: What was the home team that had an opponent of footscray?
SQL: SELECT "home_team" FROM t_1934_vfl_match WHERE "away_team" = 'footscray'