user: Question: When did the away team score 12.7 (79)?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Footscray', '7.3 (45)', 'South Melbourne', '11.9 (75)', 'Yarraville Oval', 9500.0, '4 July 1942']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Away team score" = '12.7 (79)';