user: Question: Which date has an Away team of Fitzroy?
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', '13.11 (89)', 'Richmond', '7.16 (58)', 'Glenferrie Oval', 22000.0, '30 May 1964']
SQL:

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