With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The iPhone 5C smartphone was designed by Apple.
text_B: The Ocozocoautla Formation is a geologic formation in Mexico .. Formation. Formation ( stratigraphy ). Mexico. Mexico. geologic formation. Formation ( geology ). It preserves fossils dating back to the Cretaceous period .. Cretaceous. Cretaceous. fossils. fossils. period. Period ( geology )
not_related.