Table: footscray_north_game_1929
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: What day is hawthorn the away side?
SQL: SELECT "date" FROM footscray_north_game_1929 WHERE "away_team" = 'hawthorn'

Question: What is the average crowd size for games with north melbourne as the away side?
SQL: SELECT AVG("crowd") FROM footscray_north_game_1929 WHERE "away_team" = 'north melbourne'