Table: t_1950_vfl_game_4
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: Which home team scored 13.11 (89)?
SQL: SELECT "home_team" FROM t_1950_vfl_game_4 WHERE "home_team_score" = '13.11 (89)'

Question: When an away team scored 11.17 (83), at which venue were they playing?
SQL: SELECT "venue" FROM t_1950_vfl_game_4 WHERE "away_team_score" = '11.17 (83)'

Question: On what date was a match held at MCG?
SQL: SELECT "date" FROM t_1950_vfl_game_4 WHERE "venue" = 'mcg'

Question: When Fitzroy are the away team, what is the average crowd size?
SQL: SELECT AVG("crowd") FROM t_1950_vfl_game_4 WHERE "away_team" = 'fitzroy'