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 |
| --- | --- | --- | --- | --- | --- | --- |
| Hawthorn | 9.13 (67) | St Kilda | 10.10 (70) | Glenferrie Oval | 15000.0 | 21 April 1928 |
| Essendon | 11.6 (72) | Melbourne | 13.7 (85) | Windy Hill | 20000.0 | 21 April 1928 |
| Richmond | 14.15 (99) | North Melbourne | 2.9 (21) | Punt Road Oval | 20000.0 | 21 April 1928 |
| South Melbourne | 14.16 (100) | Footscray | 15.9 (99) | Lake Oval | 20000.0 | 21 April 1928 |
| Geelong | 8.12 (60) | Collingwood | 9.12 (66) | Corio Oval | 18000.0 | 21 April 1928 |
| Fitzroy | 11.13 (79) | Carlton | 18.9 (117) | Brunswick Street Oval | 30000.0 | 21 April 1928 |
Question:
How large was the crowd when the away team was melbourne?
Answer:
20000.0