Table: t_1973_vfl_match_3
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: How big was the crowd size, at the Junction Oval venue?
SQL: SELECT SUM("crowd") FROM t_1973_vfl_match_3 WHERE "venue" = 'junction oval'

Question: What is the visiting team of Melbourne's score?
SQL: SELECT "away_team_score" FROM t_1973_vfl_match_3 WHERE "away_team" = 'melbourne'

Question: What is the average crowd size of Fitzroy's home team?
SQL: SELECT AVG("crowd") FROM t_1973_vfl_match_3 WHERE "home_team" = 'fitzroy'