<prompt> Qedela umusho olandelayo: Ngo-1970, uBartlett waya e-United States ukuyokuncintisana ochungechungeni lwe-USAC Championship aka Indy Car, ezama futhi ehluleka ukufanelekela i-  <response>: I-Indianapolis 500. UBartlett waqhudelana eminye imijaho emithathu ye-Indy Car, kodwa wehluleka ukuqeda. 