With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Famous in Love failed to star any actors.
text_B: Mametz is a commune in the Pas-de-Calais department in the Hauts-de-France region of France .. Hauts-de-France. Hauts-de-France. Pas-de-Calais. Pas-de-Calais. commune. Communes of France. department. Departments of France. France. France
not_related.