With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Invention of Lying's cast includes a comedian.
text_B: Sphaerocinidae is an extinct taxonomic family of fossil sea snails , sea butterflies , marine opisthobranch gastropod mollusks within the superfamily Cavolinioidea .. Cavolinioidea. Cavolinioidea. taxonomic. taxonomic. fossil. fossil. sea butterflies. sea butterflies. marine. marine ( ocean ). opisthobranch. opisthobranch. gastropod. gastropod
not_related.