With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Kristofer Hivju was born in Norway.
text_B: A Spartan race is a series of obstacle races of varying distance and difficulty ranging from 3 miles to marathon distances .. obstacle races. Obstacle racing. They are held in US and have been franchised to 14 countries including Canada , Europe , South Korea , and Australia .. The series include the Spartan Sprint , the Super Spartan , the Spartan Beast , and the Ultra Beast .. Spartan Race also has a military series in which an obstacle course is designed by the United States military .. obstacle course. obstacle course. There are also winter and team events .
not_related.