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 | Ground | Crowd | Date |
| --- | --- | --- | --- | --- | --- | --- |
| Richmond | 14.13 (97) | Carlton | 10.11 (71) | Colonial Stadium | 16375.0 | Friday, 1 March |
| West Coast | 14.14 (98) | Geelong | 12.12 (84) | Subiaco Oval | 13049.0 | Friday, 1 March |
| Western Bulldogs | 10.12 (72) | Port Adelaide | 16.17 (113) | Colonial Stadium | 5391.0 | Saturday, 2 March |
| Brisbane Lions | 17.6 (108) | St Kilda | 7.11 (53) | Gabba | 13025.0 | Saturday, 2 March |
| Fremantle | 13.10 (88) | Essendon | 8.7 (55) | Subiaco Oval | 11228.0 | Saturday, 2 March |
| Hawthorn | 8.9 (57) | Sydney | 15.9 (99) | Optus Oval | 4208.0 | Sunday, 3 March |
| Adelaide | 22.10 (142) | Melbourne | 4.11 (35) | Football Park | 16122.0 | Sunday, 3 March |
| Collingwood | 9.13 (67) | Kangaroos | 19.13 (127) | Colonial Stadium | 11455.0 | Sunday, 3 March |
Question:
What was the ground for away team sydney?
Answer:
Optus Oval