Table:
text: 1979 British Formula One season
Races
Races
Round Name_ Circuit Date_ Winning_driver Winning_car
1 Belgian Cup Zolder April 1 Dave Kennedy Wolf WR4
2 International Gold Cup Oulton Park April 13 Dave Kennedy Wolf WR4
3 Race of Champions Brands Hatch April 15 Guy Edwards Fittipaldi F5A
4 Sun Trophy Mallory Park May 7 Rupert Keegan Arrows A1
5 Anglia TV Trophy Snetterton May 20 Rupert Keegan Arrows A1
6 Rivet Supply Trophy Thruxton May 28 Emilio de Villota Lotus 78
7 International Whitsuntide Race Zandvoort June 4 Emilio de Villota Lotus 78
8 Donington Formula 1 Trophy Donington Park June 24 Rupert Keegan Arrows A1

text: 1979 British Formula One season
Races
Races
Round Name_ Circuit Date_ Winning_driver Winning_car
9 Daily Express Formula 1 Trophy Oulton Park June 30 Emilio de Villota Lotus 78
10 Nogaro Grand Prix Nogaro July 8 Emilio de Villota Lotus 78
11 ATV Trophy Mallory Park July 29 Dave Kennedy Wolf WR6
12 Fuji Tapes Trophy Brands Hatch August 27 Ricardo Zunino Arrows A1
13 Radio Victory Trophy Thruxton September 9 Rupert Keegan Arrows A1
14 Budweiser Trophy Snetterton September 23 Rupert Keegan Arrows A1
15 Bradford & Bingley Trophy Silverstone October 7 Gordon Smiley Surtees TS20

Question: Which circuit did Rupert Keegan win in Round 8 of the 1979 British Formula One season?