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 | Name | Circuit | Date | Winning driver | Winning car |
| --- | --- | --- | --- | --- | --- |
| 1.0 | Belgian Cup | Zolder | April 1 | Dave Kennedy | Wolf WR4 |
| 2.0 | International Gold Cup | Oulton Park | April 13 | Dave Kennedy | Wolf WR4 |
| 3.0 | Race of Champions | Brands Hatch | April 15 | Guy Edwards | Fittipaldi F5A |
| 4.0 | Sun Trophy | Mallory Park | May 7 | Rupert Keegan | Arrows A1 |
| 5.0 | Anglia TV Trophy | Snetterton | May 20 | Rupert Keegan | Arrows A1 |
| 6.0 | Rivet Supply Trophy | Thruxton | May 28 | Emilio de Villota | Lotus 78 |
| 7.0 | International Whitsuntide Race | Zandvoort | June 4 | Emilio de Villota | Lotus 78 |
| 8.0 | Donington Formula 1 Trophy | Donington Park | June 24 | Rupert Keegan | Arrows A1 |
| 9.0 | Daily Express Formula 1 Trophy | Oulton Park | June 30 | Emilio de Villota | Lotus 78 |
| 10.0 | Nogaro Grand Prix | Nogaro | July 8 | Emilio de Villota | Lotus 78 |
| 11.0 | ATV Trophy | Mallory Park | July 29 | Dave Kennedy | Wolf WR6 |
| 12.0 | Fuji Tapes Trophy | Brands Hatch | August 27 | Ricardo Zunino | Arrows A1 |
| 13.0 | Radio Victory Trophy | Thruxton | September 9 | Rupert Keegan | Arrows A1 |
| 14.0 | Budweiser Trophy | Snetterton | September 23 | Rupert Keegan | Arrows A1 |
| 15.0 | Bradford & Bingley Trophy | Silverstone | October 7 | Gordon Smiley | Surtees TS20 |
Question:
What circuit did Rupert Keegan win in round 8?
Answer:
Donington Park