With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Cara Delevingne was involved in a romantic, mystery film called Paper Towns.
text_B: Petteria ramentacea , commonly known as Dalmatian Laburnum , is a species of flowering plants in the legume family , Fabaceae .. Fabaceae. Fabaceae. legume. legume. It belongs to the subfamily Faboideae .. Faboideae. Faboideae. It is the only member of the genus Petteria .
not_related.