Table: t_1939_vfl_match_3
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: When did the away team score at Punt Road Oval?
SQL: SELECT "away_team_score" FROM t_1939_vfl_match_3 WHERE "venue" = 'punt road oval'

Question: How many points did North Melbourne score?
SQL: SELECT "home_team_score" FROM t_1939_vfl_match_3 WHERE "home_team" = 'north melbourne'