With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Joey Graceffa is anything but a YouTube celebrity.
text_B: The Pewee Coal is a geologic formation in Tennessee .. geologic formation. Formation ( geology ). Tennessee. Tennessee. It preserves fossils dating back to the Carboniferous period .. Carboniferous. Carboniferous. fossils. fossils. period. Period ( geology )
not_related.