With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Leukemia usually begins in the bone marrow and produces abnormal white blood cells.
text_B: The following is a list of episodes of the Italian television series RIS Delitti Imperfetti .. RIS Delitti Imperfetti. RIS Delitti Imperfetti. Season 1 features 12 episodes , seasons 2 -- 3 feature 16 episodes each and season 4 -- 8 feature 20 episodes each .. Season 1 aired from January 11 to February 16 , 2005 .. , season 2 from January 9 to February 20 , 2006 .. , season 3 from January 15 to February 20 , 2007 .. , season 4 from January 17 to March 20 , 2008 .. , season 5 from January 13 to March 18 , 2009 .. , season 6 from March 18 to May 20 , 2010 .. , season 7 from March 22 to May 24 , 2011 .. and season 8 from October 3 to November 28 , 2012 .. RIS Delitti Imperfetti concluded after 8 seasons and 144 episodes running .. RIS Delitti Imperfetti. RIS Delitti Imperfetti
not_related.