With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Frenemies is solely based on a novel by Janis Joplin.
text_B: A book sales club is a subscription-based method of selling and purchasing books .. subscription. subscription. book. book. It is more often called simply a book club , a term that is also used to describe a book discussion club , which can cause confusion .. book. book. book discussion club. book discussion club
not_related.