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:
| Race Title | Circuit | City / State | Date | Winner | Team |
| --- | --- | --- | --- | --- | --- |
| Launceston | Symmons Plains Raceway | Launceston , Tasmania | 1 Mar | Dick Johnson | Dick Johnson Racing |
| Calder | Calder Park Raceway | Melbourne , Victoria | 15 Mar | Peter Brock | Holden Dealer Team |
| Oran Park | Oran Park Raceway | Sydney , New South Wales | 22 Mar | Dick Johnson | Dick Johnson Racing |
| Sandown | Sandown Raceway | Melbourne, Victoria | 12 Apr | Dick Johnson | Dick Johnson Racing |
| Perth | Wanneroo Park | Perth , Western Australia | 26 Apr | Peter Brock | Holden Dealer Team |
| Adelaide | Adelaide International Raceway | Adelaide , South Australia | 3 May | Peter Brock | Holden Dealer Team |
| Surfers Paradise | Surfers Paradise Raceway | Surfers Paradise , Queensland | 17 May | Dick Johnson | Dick Johnson Racing |
| Lakeside | Lakeside International Raceway | Brisbane , Queensland | 21 Jun | Dick Johnson | Dick Johnson Racing |
Question:
What date is the circuit at wanneroo park?
Answer:
26 Apr