<prompt> Ngwala go tšwela pele bakeng sa serapa se - Sehla sa Grand Prix sa 1959 se bone Shelby a otlela Aston Martin DBR4 go Dutch Grand Prix ka May, gomme a latelwa ke British Grand Prix kua Aintree ka July. Shelby ka morago o ile a otlela Grand Prix ya Portugal ka August, a latelwa ke Grand Prix ya Italy  <response>: ka September. 