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 |
| --- | --- | --- | --- | --- | --- | --- |
| Melbourne | 10.11 (71) | St Kilda | 10.16 (76) | MCG | 30581.0 | 13 July 1968 |
| Footscray | 18.18 (126) | Geelong | 5.13 (43) | Western Oval | 13092.0 | 13 July 1968 |
| Essendon | 16.19 (115) | North Melbourne | 9.9 (63) | Windy Hill | 11690.0 | 13 July 1968 |
| Collingwood | 18.14 (122) | Fitzroy | 18.7 (115) | Victoria Park | 16357.0 | 13 July 1968 |
| Carlton | 11.14 (80) | Richmond | 10.14 (74) | Princes Park | 24245.0 | 13 July 1968 |
| South Melbourne | 12.10 (82) | Hawthorn | 15.11 (101) | Lake Oval | 11191.0 | 13 July 1968 |
Question:
On what date was Richmond playing as an away team?
Answer:
13 July 1968