With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Nepal has an ancient confederation called Nepal Mandala.
text_B: The Bolast Formation is a geologic formation in France .. Formation. Formation ( stratigraphy ). France. France. geologic formation. Formation ( geology ). It preserves fossils dating back to the Devonian period .. Devonian. Devonian. fossils. fossils. period. Period ( geology )
not_related.