With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Borussia Dortmund's colors are pink and green.
text_B: The 2014 -- 15 season was Paris Saint-Germain Football Club 's 45th in existence and their 42nd in the top-flight of French football .. Paris Saint-Germain. Paris Saint-Germain F.C.. Paris Saint-Germain Football Club. Paris Saint-Germain F.C.. top-flight. French football league system. French football. French football. The team competed in Ligue 1 , the Coupe de France , the Coupe de la Ligue , the Trophee des Champions and the UEFA Champions League .. Ligue 1. Ligue 1. Coupe de France. Coupe de France. Coupe de la Ligue. Coupe de la Ligue. Trophee des Champions. Trophee des Champions. UEFA Champions League. UEFA Champions League
not_related.