user: Question: Who was the away team when North Melbourne was the home team?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['North Melbourne', '4.10 (34)', 'Richmond', '12.11 (83)', 'Arden Street Oval', 7500.0, '5 July 1947']
SQL:

assistant: SELECT "Away team" FROM "Table" WHERE "Home team" = 'North Melbourne';