With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Bertrand Russell's work has had a considerable influence on cognitive theory.
text_B: Gaya is a department of the Dosso Region in Niger .. Niger. Niger. Region. Regions of Niger. Dosso Region. Dosso Region. department. Departments of Niger. Gaya. Gaya, Niger. Its capital lies at the city of Gaya .. Gaya. Gaya, Niger. As of 2011 , the department had a total population of 349,794 people .. department. Departments of Niger
not_related.