With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Beatles played in Liverpool.
text_B: The Silver Creek Formation is a geologic formation in Indiana .. Formation. Formation ( stratigraphy ). geologic formation. Formation ( geology ). Indiana. Indiana. It preserves fossils dating back to the Devonian period .. Devonian. Devonian. fossils. fossils. period. Period ( geology )
not_related.