user: Question: What was total size of the crowd at a home game for North Melbourne?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Fitzroy', '12.11 (83)', 'Richmond', '12.15 (87)', 'Brunswick Street Oval', 32000.0, '20 April 1946']
SQL:

assistant: SELECT SUM("Crowd") FROM "Table" WHERE "Home team" = 'North Melbourne';