user: Question: Who was North Melbourne's home opponent?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Richmond', '18.20 (128)', 'St Kilda', '19.14 (128)', 'MCG', 37076.0, '12 April 1980']
SQL:

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