With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Acting was a career of O. J. Simpson.
text_B: The 1972 World 600 , the 13th running of the event , was a NASCAR Winston Cup Series racing event that was held on May 28 , 1972 , at Charlotte Motor Speedway in the American community of Concord , North Carolina .. Charlotte Motor Speedway. Charlotte Motor Speedway. event. Coca-Cola 600. NASCAR. NASCAR. Winston Cup Series. Sprint Cup Series. American. United States. South Carolina 's blue laws were in full force during the era of the race and bull-baiting was considered to be illegal on a Sunday along with several other things that were considered to be prohibited .. bull-baiting. bull-baiting. The pace car driver was Robert `` Bob '' Colvin who nearly got arrested for violating the `` blue laws '' before he found out that they were for someone else 's bad checks .. In addition to watching the event live , NASCAR followers who either lived or visited the Concord , North Carolina region could watch it on their transistor radios ; a key to following the major NASCAR races prior to ESPN and Twitter .. event. Coca-Cola 600. NASCAR. NASCAR. ESPN. NASCAR on ESPN. Twitter. Twitter
not_related.