user: Question: When did the away team score 11.7 (73)?
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', '12.17 (89)', 'South Melbourne', '13.20 (98)', 'Arden Street Oval', 9454.0, '14 June 1971']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Away team score" = '11.7 (73)';