With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Tony Blair was leader of the church.
text_B: The Andromeda Strain , by Michael Crichton , is a 1969 techno-thriller novel documenting the efforts of a team of scientists investigating the outbreak of a deadly extraterrestrial microorganism in Arizona .. Michael Crichton. Michael Crichton. techno-thriller. techno-thriller. outbreak. outbreak. extraterrestrial. extraterrestrial life. microorganism. microorganism. Arizona. Arizona. The Andromeda Strain appeared in the New York Times Best Seller list , establishing Michael Crichton as a genre writer .. Michael Crichton. Michael Crichton. genre. genre
not_related.