With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Superunknown sold 310,000 original copies in its opening week.
text_B: Edwin Charles Krupp -LRB- born November 18 , 1944 -RRB- is an American astronomer , researcher , author , and popularizer of science .. astronomer. astronomer. He is also known as Ed or E.C. .. He is an internationally recognized expert in the field of archaeoastronomy , the study of how ancient cultures viewed the sky and how those views affected their cultures .. archaeoastronomy. archaeoastronomy. He has taught at the college level , as a planetarium lecturer , and in various documentary films .. planetarium. planetarium. He has been the director of the Griffith Observatory in Los Angeles since first taking over the position in 1974 after the departure of the previous director , William J. Kaufmann III .. Griffith Observatory. Griffith Observatory. Los Angeles. Los Angeles. His writings include science papers and journal articles , astronomy magazine articles , books on astronomy and archaeoastronomy for adults , and books explaining sky phenomena and astronomy to children .. archaeoastronomy. archaeoastronomy. Krupp is a member of the American Astronomical Society and the International Astronomical Union , and has served in several divisions and commissions of both organizations .. American Astronomical Society. American Astronomical Society. International Astronomical Union. International Astronomical Union. He is also a fellow of the Committee for Skeptical Inquiry and a member of that organization 's Council for Media Integrity .. fellow. fellow. Committee for Skeptical Inquiry. Committee for Skeptical Inquiry. Council for Media Integrity. Committee for Skeptical Inquiry#CforMI
not_related.