With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: William Hanna worked at an American media company.
text_B: Mech Mice Genesis Strike is a fiction book written by Christopher and Allan Miller , as the `` Miller Brothers '' , and published by Spearhead Books in February 2012 .. fiction. fiction. Christopher. Christopher Miller ( author ). Allan Miller. Allan Miller ( author ). Spearhead Books. Spearhead Books. The book was announced on March 23 , 2011 , on the RocketSnail Games website .. The chapters of the book were put online once every month , including illustrations .. The book was based on the newly announced game , Mech Mice , which was published in public beta mode on July 9 , 2013 .
not_related.