With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Jean Grey is known under the alias Phoenix in comics.
text_B: Levophenacylmorphan is a morphinan derivative that acts as an opioid agonist .. morphinan. morphinan. opioid. opioid. It has potent analgesic effects and is around 10x more potent than morphine .. analgesic. analgesic. morphine. morphine. Adverse effects associated with its use are those of the opioids as a whole , including pruritus , nausea , respiratory depression , euphoria and development of tolerance and dependence to its effects .. pruritus. pruritus. nausea. nausea. respiratory depression. respiratory depression. euphoria. euphoria
not_related.