With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Usain Bolt is incapable of helping Jamaica.
text_B: Lynn Nadel -LRB- born 12 November 1942 -RRB- is the Regents ' Professor of psychology at the University of Arizona .. Professor. Professor. psychology. psychology. University of Arizona. University of Arizona. Nadel specializes in memory , and has investigated the role of the hippocampus in memory formation .. memory. memory. hippocampus. hippocampus. Together with John O'Keefe , he coauthored the influential 1978 book The Hippocampus as a Cognitive Map , which defended the theory that the hippocampus learns and stores cognitive maps of portions of space .. hippocampus. hippocampus. John O'Keefe. John O'Keefe ( neuroscientist ). He later advanced the multiple trace theory that the hippocampus is always involved in storage and retrieval of episodic memory , but that semantic memory can be established in the neocortex .. memory. memory. hippocampus. hippocampus. multiple trace theory. multiple trace theory. episodic memory. episodic memory. semantic memory. semantic memory. neocortex. neocortex. Nadel received a Ph.D. from McGill University in 1967 , and joined the faculty of the University of Arizona in 1985 , where he currently serves as director of the Cognition and Neural Systems Program .. University of Arizona. University of Arizona. McGill University. McGill University. Nadel , together with John O'Keefe , received the 2006 Grawemeyer Award for their work in identifying the brain 's mapping system .. John O'Keefe. John O'Keefe ( neuroscientist ). Grawemeyer Award. Grawemeyer Award. Nadel is editor-in-chief of the scientific journal , Wiley Interdisciplinary Reviews  : Cognitive Science .. editor-in-chief. editor-in-chief. scientific journal. scientific journal
not_related.