With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Patty Hearst was kidnapped by the Symbionese Liberation Army in Berkeley, California.
text_B: MGS-0039 is a drug that is used in neuroscientific research , which acts as a potent and selective antagonist for group II of the metabotropic glutamate receptors -LRB- mGluR2 / 3 -RRB- .. drug. drug. neuroscientific research. scientific research. potent. potency ( pharmacology ). selective. binding selectivity. antagonist. receptor antagonist. group II. Metabotropic glutamate receptor#Group II & Group III. It produces antidepressant and anxiolytic effects in animal studies , and has been shown to boost release of dopamine and serotonin in specific brain areas .. antidepressant. antidepressant. anxiolytic. anxiolytic. dopamine. dopamine. serotonin. serotonin. Research has suggested this may occur through a similar mechanism as that suggested for the similarly glutamatergic drug ketamine .. drug. drug. ketamine. ketamine
not_related.