With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mission: Impossible is a book series.
text_B: Abyssotrophon teratus is a species of sea snail , a marine gastropod mollusk in the family Muricidae , the murex snails or rock snails .. Muricidae. Muricidae. Abyssotrophon. Abyssotrophon. species. species. sea snail. sea snail. gastropod. gastropod. mollusk. mollusk. family. family ( biology )
not_related.