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:
| Player | Overs | Figures | Opponent | Ground |
| --- | --- | --- | --- | --- |
| Ben Edmondson (Western Australia) | 4.0 | 4/14 | South Australia | Adelaide Oval |
| Steven Smith (New South Wales) | 3.3 | 4/15 | Queensland | ANZ Stadium |
| Dirk Nannes (Victoria) | 4.0 | 4/23 | Western Australia | WACA Ground |
| Steven Smith (New South Wales) | 3.3 | 3/18 | Western Australia | ANZ Stadium |
| Brett Dorey (Western Australia) | 4.0 | 3/19 | Queensland | WACA Ground |
Question:
At which ground did Dirk Nannes have a figure of 4/23?
Answer:
WACA Ground