user: Question: What was the date of the game when Richmond 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: ['Collingwood', '20.14 (134)', 'Fitzroy', '12.15 (87)', 'Victoria Park', 16892.0, '31 August 1963']
SQL:

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