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 |
| --- | --- | --- | --- | --- | --- | --- |
| Footscray | 13.7 (85) | Melbourne | 6.12 (48) | Western Oval | 10441.0 | 18 May 1968 |
| Fitzroy | 6.8 (44) | St Kilda | 19.6 (120) | Princes Park | 12852.0 | 18 May 1968 |
| Collingwood | 13.14 (92) | Essendon | 9.12 (66) | Victoria Park | 28302.0 | 18 May 1968 |
| Richmond | 14.17 (101) | North Melbourne | 4.7 (31) | MCG | 24317.0 | 18 May 1968 |
| Hawthorn | 10.11 (71) | Geelong | 12.10 (82) | Glenferrie Oval | 10100.0 | 18 May 1968 |
| South Melbourne | 10.11 (71) | Carlton | 12.11 (83) | Lake Oval | 13420.0 | 18 May 1968 |
Question:
What date was the game played at Lake Oval?
Answer:
18 May 1968