user: Question: Who was the home team for the game where North Melbourne was the away team and the crowd was over 12000?
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', '13.12 (90)', 'North Melbourne', '12.22 (94)', 'Western Oval', 17300.0, '24 June 1950']
SQL:

assistant: SELECT "Home team" FROM "Table" WHERE "Crowd" > 12000.0 AND "Away team" = 'North Melbourne';