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 |
| --- | --- | --- | --- | --- | --- | --- |
| Fitzroy | 16.27 (123) | South Melbourne | 8.9 (57) | Brunswick Street Oval | 12500.0 | 13 May 1950 |
| Essendon | 21.9 (135) | Footscray | 9.10 (64) | Windy Hill | 18000.0 | 13 May 1950 |
| Carlton | 17.15 (117) | Richmond | 16.10 (106) | Princes Park | 29000.0 | 13 May 1950 |
| St Kilda | 12.8 (80) | North Melbourne | 10.18 (78) | Junction Oval | 30000.0 | 13 May 1950 |
| Melbourne | 10.7 (67) | Geelong | 9.16 (70) | MCG | 23000.0 | 13 May 1950 |
| Hawthorn | 6.12 (48) | Collingwood | 7.25 (67) | Glenferrie Oval | 9000.0 | 13 May 1950 |
Question:
What was the lowest crowd size at the Windy Hill venue?
Answer:
18000.0