With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mammals sometimes called "sea cows" are Manatees.
text_B: Olcani is a commune in the Haute-Corse department of France on the island of Corsica .. commune. Communes of France. Haute-Corse. Haute-Corse. department. Departments of France. France. France. Corsica. Corsica
not_related.