With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ben Affleck stars in Gone Girl.
text_B: Carl Frederick Kaestle -LRB- born March 27 , 1940 -RRB- is University Professor and Professor of Education , History , and Public Policy emeritus at Brown University .. Brown University. Brown University. His historical research has focused on the development of American schools , particularly in the 1800s .. He has worked at the University of Chicago and University of Wisconsin -- Madison and is a former president of the National Academy of Education .. University of Chicago. University of Chicago
not_related.