With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Great Gatsby is not a book.
text_B: Margarites kophameli is a species of sea snail , a marine gastropod mollusk in the family Margaritidae .. species. species. sea snail. sea snail. marine. marine ( ocean ). gastropod. gastropod. mollusk. mollusk. family. family ( biology ). Margaritidae. Margaritidae
not_related.