Table: t_1929_vfl_match_2
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: How large was the crowd at Carlton's home game?
SQL: SELECT COUNT("crowd") FROM t_1929_vfl_match_2 WHERE "home_team" = 'carlton'

Question: On what date did the away team score 12.9 (81)?
SQL: SELECT "date" FROM t_1929_vfl_match_2 WHERE "away_team_score" = '12.9 (81)'