With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Einstein acquired citizenship.
text_B: Bourlon is a commune in the Pas-de-Calais department in the Hauts-de-France region in northern France .. commune. Communes of France. Pas-de-Calais. Pas-de-Calais. department. Departments of France. Hauts-de-France. Hauts-de-France. region. Regions of France. France. France
not_related.