user: Question: When was the game 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: ['Hawthorn', '13.22 (100)', 'Richmond', '10.22 (82)', 'Princes Park', 20110.0, '24 April 1982']
SQL:

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