With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Man with the Iron Fists stars an actor.
text_B: The 1979 Southeastern 500 was a NASCAR Winston Cup Series racing event that took place on April 1 , 1979 , at Bristol Motor Speedway in the American community of Bristol , Tennessee .. NASCAR. NASCAR. Winston Cup Series. Sprint Cup Series. Bristol Motor Speedway. Bristol Motor Speedway. Rookie Dale Earnhardt got his first win of his very successful career in this race .. Dale Earnhardt. Dale Earnhardt. By the following season , NASCAR had completely stopped tracking the year model of all the vehicles and most teams did not take stock cars to the track under their own power anymore .. NASCAR. NASCAR. the following season. 1980 NASCAR Winston Cup Series
not_related.