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 |
| --- | --- | --- | --- | --- | --- | --- |
| Hawthorn | 17.16 (118) | North Melbourne | 11.17 (83) | Princes Park | 16106.0 | 25 April 1981 |
| Collingwood | 21.20 (146) | Melbourne | 13.5 (83) | Victoria Park | 30096.0 | 25 April 1981 |
| Richmond | 15.22 (112) | Geelong | 11.18 (84) | MCG | 46230.0 | 25 April 1981 |
| South Melbourne | 18.22 (130) | Footscray | 9.14 (68) | Lake Oval | 12545.0 | 25 April 1981 |
| St Kilda | 10.13 (73) | Carlton | 19.23 (137) | Moorabbin Oval | 32341.0 | 25 April 1981 |
| Fitzroy | 19.11 (125) | Essendon | 15.14 (104) | VFL Park | 33465.0 | 25 April 1981 |
Question:
On what date was essendon the away team?
Answer:
25 April 1981