With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Glenn Frey was front man for Eagles.
text_B: Cerithideopsis costata is a species of small sea snail , a marine gastropod mollusk in the family Potamididae .. Potamididae. Potamididae. Cerithideopsis. Cerithideopsis. species. species. sea snail. sea snail. gastropod. gastropod. mollusk. mollusk. family. family ( biology )
not_related.