user: Question: What is the date where the away team is Richmond?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Melbourne', '24.17 (161)', 'St Kilda', '12.24 (96)', 'MCG', 18435.0, '25 August 1979']
SQL:

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