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 | 14.16 (100) | South Melbourne | 13.15 (93) | Moorabbin Oval | 17454.0 | 21 July 1973 |
| Footscray | 6.9 (45) | Hawthorn | 9.11 (65) | Western Oval | 10987.0 | 21 July 1973 |
| Richmond | 16.14 (110) | Melbourne | 9.19 (73) | MCG | 30492.0 | 21 July 1973 |
| Geelong | 12.10 (82) | Essendon | 11.15 (81) | Kardinia Park | 16746.0 | 21 July 1973 |
| Fitzroy | 12.19 (91) | Carlton | 11.14 (80) | Junction Oval | 14800.0 | 21 July 1973 |
| North Melbourne | 11.10 (76) | Collingwood | 10.11 (71) | VFL Park | 25650.0 | 21 July 1973 |
Question:
When the Home team was north melbourne what was the Date of the game?
Answer:
21 July 1973