With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Neil deGrasse Tyson wrote essays for the geology section of Natural History magazine from 1995 to 2005.
text_B: Xue Qikun is a physicist of Tsinghua University .. Tsinghua University. Tsinghua University. He has done much work in Condensed Matter Physics , especially on superconductors and topological insulators .. He is a member of the Chinese Academy of Sciences , vice president for research of Tsinghua University , and director of State Key Lab of Quantum Physics .. Tsinghua University. Tsinghua University. Chinese Academy of Sciences. Chinese Academy of Sciences
not_related.