Table:
text: 1985 Formula One season
Season review
Season review
Race Date_ Location_ Pole_Position Fastest_Lap Race_Winner Constructor_ Report
French Grand Prix 7 July Paul Ricard Keke Rosberg Keke Rosberg Nelson Piquet Brabham - BMW Report
British Grand Prix 21 July Silverstone Keke Rosberg Alain Prost Alain Prost McLaren - TAG Report
German Grand Prix 4 August Nürburgring Teo Fabi Niki Lauda Michele Alboreto Ferrari Report
Austrian Grand Prix 18 August Österreichring Alain Prost Alain Prost Alain Prost McLaren - TAG Report
Dutch Grand Prix 25 August Zandvoort Nelson Piquet Alain Prost Niki Lauda McLaren - TAG Report
Italian Grand Prix 8 September Monza Ayrton Senna Nigel Mansell Alain Prost McLaren - TAG Report
Belgian Grand Prix 15 September Spa-Francorchamps Alain Prost Alain Prost Ayrton Senna Lotus - Renault Report

Question: What is the constructor for the race with Nigel Mansell as the fastest lap in the 1985 Formula 1 season?

Question: Who was the winner at Spa-Francorchamps in the 1985 Formula 1 season?