With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Silicon Valley is in a populous region and is cultured.
text_B: The Almejas Formation is a geologic formation in Mexico .. Formation. Formation ( stratigraphy ). Mexico. Mexico. geologic formation. Formation ( geology ). It preserves fossils dating back to the Neogene period .. Neogene. Neogene. fossils. fossils. period. Period ( geology )
not_related.