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Ayrton Senna, Alain Prost, McLaren-Honda MP4/5, Grand Prix of San Marino, Autodromo Enzo e Dino Ferrari, Imola, 23 April 1989. Ayrton Senna ahead of Alain Prost in the 1989 San Marino Grand Prix, Senna claiming victory. (Photo by Paul-Henri Cahier/Getty Images)

Ayrton Senna, Alain Prost, McLaren-Honda MP4/5, Grand Prix of San Marino, Autodromo Enzo e Dino Ferrari, Imola, 23 April 1989. Ayrton Senna ahead of Alain Prost in the 1989 San Marino Grand Prix, Senna claiming victory. (Photo by Paul-Henri Cahier/Getty Images)