Table:
text: 1963 Formula One season
Season review
Season review
Race Circuit Date_ Pole_position Fastest_lap Winning_driver Constructor_ Tyre Report
Monaco Grand Prix Monaco 26 May Jim Clark John Surtees Graham Hill BRM D Report
Belgian Grand Prix Spa-Francorchamps 9 June Graham Hill Jim Clark Jim Clark Lotus - Climax D Report
Dutch Grand Prix Zandvoort 23 June Jim Clark Jim Clark Jim Clark Lotus - Climax D Report
French Grand Prix Reims 30 June Jim Clark Jim Clark Jim Clark Lotus - Climax D Report
British Grand Prix Silverstone 20 July Jim Clark John Surtees Jim Clark Lotus - Climax D Report
German Grand Prix Nürburgring 4 August Jim Clark John Surtees John Surtees Ferrari D Report

Question: Name the victorious driver of the 1963 Formula 1 season in the Belgian Grand Prix season review?