With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mel Gibson studied when he was at National Institute of Dramatic Art.
text_B: Robin Furth was the personal research assistant to Stephen King and the author of Stephen King 's The Dark Tower  : A Complete Concordance , which was published by Scribner on December 5 , 2006 .. Stephen King. Stephen King. The Dark Tower. The Dark Tower ( series ). It is a compilation of her two previous encyclopedic books dealing with King 's magnum opus , The Dark Tower  : A Concordance , volume I - which explores the first four books in King 's series - and A Concordance II , which gives the reader definitions and explanations of pivotal terms used over the course of the final three books of The Dark Tower .. The Dark Tower. The Dark Tower ( series ). magnum opus. masterpiece. She is now currently working on the graphic novel adaptation of the Dark Tower for Marvel Comics .
not_related.