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:
| Round | Round | Circuit | Date | Pole Position | Fastest Lap | Winning Driver | Winning Team | Winning Privateer |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | R1 | Mantorp Park | 10 May | Mattias Ekström | Fredrik Ekblom | Mats Lindén | Kristoffersson Motorsport | Richard Göransson |
| 1 | R2 | Mantorp Park | 10 May |  | Peggen Andersson | Fredrik Ekblom | BMW Dealer Team | Pontus Mörth |
| 2 | R3 | Karlskoga-Gelleråsen | 31 May | Jan Nilsson | Jan Nilsson | Jan Nilsson | Flash Engineering | Pontus Mörth |
| 2 | R4 | Karlskoga-Gelleråsen | 31 May |  | Fredrik Ekblom | Peggen Andersson | BMW Dealer Team | Pontus Mörth |
| 3 | R5 | Anderstorp | 28 June | Mattias Ekström | Fredrik Ekblom | Jan Nilsson | Flash Engineering | Pontus Mörth |
| 3 | R6 | Anderstorp | 28 June |  | Peggen Andersson | Peggen Andersson | BMW Dealer Team | Georg Bakajev |
| 4 | R7 | Falkenberg | 9 July | Jens Edman | Jens Edman | Jan Nilsson | Flash Engineering | Pontus Mörth |
| 4 | R8 | Falkenberg | 9 July |  | Mattias Ekström | Jens Edman | Flash Engineering | Pontus Mörth |
| 5 | R9 | Ring Knutstorp | 6 September | Fredrik Ekblom | Fredrik Ekblom | Fredrik Ekblom | BMW Dealer Team | Pontus Mörth |
| 5 | R10 | Ring Knutstorp | 6 September |  | Mats Lindén | Jan Nilsson | Flash Engineering | Georg Bakajev |
| 6 | R11 | Mantorp Park | 27 September | Tommy Kristoffersson | Fredrik Ekblom | Fredrik Ekblom | BMW Dealer Team | Pontus Mörth |
| 6 | R12 | Mantorp Park | 27 September |  | Peggen Andersson | Jan Nilsson | Flash Engineering | Pontus Mörth |
Question:
what date was listed before june 28th?
Answer:
31 May