user: Question: What was the date of the game when the home team scored 21.18 (144) and the away team scored 16.19 (115)?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['St Kilda', '8.16 (64)', 'North Melbourne', '25.18 (168)', 'Moorabbin Oval', 16860.0, '16 May 1981']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Home team score" = '21.18 (144)' AND "Away team score" = '16.19 (115)';