With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: De Profundis was written by communists.
text_B: The Rocky Mountain Foothills are an upland area flanking the eastern side of the Rocky Mountains , extending south from the Liard River into Alberta .. Rocky Mountains. Rocky Mountains. Liard River. Liard River. Alberta. Alberta. Bordering the Interior Plains system , they are part of the Rocky Mountain System or Eastern System of the Western Cordillera of North America .. Interior Plains. Interior Plains. Rocky Mountain System. Rocky Mountain System. Western Cordillera of North America. Western Cordillera ( North America )
not_related.