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:
| Event | Circuit | Date | Pole Position | Race 1 Winner | Race 2 Winner | Race 3 Winner |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Albert Park Street Circuit | 28–29 March | Nick Percat | Nick Percat | Nick Percat | no third race |
| 2.0 | Winton Motor Raceway | 2–3 May | Nick Percat | Nick Percat | Nick Percat | Nick Percat |
| 3.0 | Symmons Plains Raceway | 31 May | Chaz Mostert | Nick Percat | Nick Percat | Richie Stanaway |
| 4.0 | Hidden Valley Raceway | 19 June | Nick Percat | Nick Percat | Nick Percat | Nick Percat |
| 5.0 | Sandown Raceway | 2 August | Chaz Mostert | Mitch Evans | Scott Pye | Scott Pye |
| 6.0 | Queensland Raceway | 23 August | Mitch Evans | Tim Macrow | Mitch Evans | Mitch Evans |
| 7.0 | Phillip Island Grand Prix Circuit | 13 September | Mitch Evans | Nick Percat | Nick Percat | Chaz Mostert |
Question:
What date was the race at the Symmons Plains Raceway?
Answer:
31 May