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:
| Date | Opponent | Venue | Result | Scorers |
| --- | --- | --- | --- | --- |
| 18 Jul | Sheffield Wednesday | Blundell Park , Cleethorpes | L 1 - 2 | Hegarty |
| 22 Jul | Rotherham United | Blundell Park , Cleethorpes | D 1 - 1 | Gritton |
| 26 Jul | Leeds United | Blundell Park , Cleethorpes | D 1 - 1 | Reddy |
| 31 Jul | Lincoln City | Sincil Bank , Lincoln | W 1 - 0 | Parkinson |
| 2 Aug | Blackburn Rovers | Blundell Park , Cleethorpes | L 1 - 2 | R.Jones |
Question:
what is the date when scorers is parkinson?
Answer:
31 Jul