user: Question: What day is Richmond the away side?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['North Melbourne', '6.6 (42)', 'South Melbourne', '19.20 (134)', 'Arden Street Oval', 12500.0, '22 August 1959']
SQL:

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