Table: t_1960_vfl_game
Columns: home_team
home_team_score
away_team
away_team_score
venue
crowd
date

Question: What is the crowd size of the game where the away team scored 8.15 (63)?
SQL: SELECT SUM("crowd") FROM t_1960_vfl_game WHERE "away_team_score" = '8.15 (63)'