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 |
| --- | --- | --- | --- | --- | --- | --- |
| North Melbourne | 6.13 (49) | St Kilda | 9.7 (61) | Arden Street Oval | 14409.0 | 11 May 1968 |
| Essendon | 16.16 (112) | Fitzroy | 11.15 (81) | Windy Hill | 18500.0 | 11 May 1968 |
| Collingwood | 17.11 (113) | Hawthorn | 11.16 (82) | Victoria Park | 20688.0 | 11 May 1968 |
| Carlton | 16.15 (111) | Footscray | 5.9 (39) | Princes Park | 14490.0 | 11 May 1968 |
| South Melbourne | 8.10 (58) | Richmond | 13.25 (103) | Lake Oval | 17783.0 | 11 May 1968 |
| Melbourne | 9.9 (63) | Geelong | 10.10 (70) | MCG | 31862.0 | 11 May 1968 |
Question:
On which date did Richmond play as an away team?
Answer:
11 May 1968