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 | 15.13 (103) | South Melbourne | 6.15 (51) | Glenferrie Oval | 11000.0 | 11 July 1964 |
| Geelong | 7.12 (54) | Melbourne | 10.15 (75) | Kardinia Park | 33761.0 | 11 July 1964 |
| Richmond | 12.11 (83) | Footscray | 9.7 (61) | Punt Road Oval | 12000.0 | 11 July 1964 |
| St Kilda | 5.13 (43) | Essendon | 11.10 (76) | Junction Oval | 30100.0 | 11 July 1964 |
| Fitzroy | 5.8 (38) | Collingwood | 13.10 (88) | Brunswick Street Oval | 17093.0 | 11 July 1964 |
| North Melbourne | 6.12 (48) | Carlton | 7.5 (47) | Arden Street Oval | 16020.0 | 11 July 1964 |
Question:
What was the size of the crowd when the away team scored 6.15 (51)?
Answer:
11000.0