premise: The 1976 SCCA/USAC Formula 5000 Championship was the tenth running of the Sports Car Club of America's premier open wheel racing series and the third to be co-sanctioned by the Sports Car Club of America (SCCA) and the United States Auto Club (USAC).
hypothesis: The 1976 SCCA/USAC Formula 5000 Championship is based in North America.
reason: The 1976 SCCA/USAC Formula 5000 Championship is based in the United States, which is in North America. The system likely did not recognize that the United States is in North America.