Table: t_1941_vfl_match_3
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: What is the average crowd when the home team is north melbourne?
SQL: SELECT AVG("crowd") FROM t_1941_vfl_match_3 WHERE "home_team" = 'north melbourne'

Question: What is the crowd total at mcg?
SQL: SELECT COUNT("crowd") FROM t_1941_vfl_match_3 WHERE "venue" = 'mcg'