user: Question: What day does the away team score 7.8 (50)?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Collingwood', '12.16 (88)', 'St Kilda', '8.9 (57)', 'Victoria Park', 23458.0, '1 June 1957']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Away team score" = '7.8 (50)';