With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The National Security Agency was banned from doing anything related to intelligence.
text_B: David Herbert Shipman -LRB- 4 November 1932 -- 22 April 1996 -RRB- was an English film critic and writer , best known for his trilogy of books on film stars .
not_related.