Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Home team | Home team score | Away team | Away team score | Venue | Crowd | Date |
| --- | --- | --- | --- | --- | --- | --- |
| St Kilda | 8.16 (64) | North Melbourne | 25.18 (168) | Moorabbin Oval | 16860.0 | 16 May 1981 |
| South Melbourne | 17.25 (127) | Melbourne | 12.11 (83) | Lake Oval | 12808.0 | 16 May 1981 |
| Richmond | 25.17 (167) | Footscray | 17.15 (117) | MCG | 21721.0 | 16 May 1981 |
| Hawthorn | 21.18 (144) | Fitzroy | 16.19 (115) | Princes Park | 17459.0 | 16 May 1981 |
| Geelong | 12.8 (80) | Carlton | 12.13 (85) | Kardinia Park | 28396.0 | 16 May 1981 |
| Essendon | 21.18 (144) | Collingwood | 14.3 (87) | VFL Park | 79326.0 | 16 May 1981 |
Question:
What was the date of the game when the home team scored 21.18 (144) and the away team scored 16.19 (115)?
Answer:
16 May 1981