<prompt> Pedzisa mutsara unotevera: Muna 1970, Bartlett akaenda kuUnited States kunokwikwidza muUSAC Championship aka Indy Car nhevedzano, achiedza uye achitadza kukodzera  <response>: Indianapolis 500. Bartlett akakwikwidza mune dzimwe nhangemutange nhatu dzeIndy Car, asi akakundikana kupedza. 