user: Question: what is the date when the away team is Melbourne?
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', '25.11 (161)', 'North Melbourne', '13.11 (89)', 'Glenferrie Oval', 14000.0, '27 April 1940']
SQL:

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