user: Question: Who is the away side when North Melbourne is the home side?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Footscray', '16.16 (112)', 'Richmond', '12.9 (81)', 'Western Oval', 33753.0, '23 April 1955']
SQL:

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