With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Simpsons series will be cancelled on the 28th season.
text_B: Somnambulist is the second album by experimental , progressive metal band Sicmonic , independently released on September 9 , 2008 .. Sicmonic. Sicmonic. experimental. Experimental metal. progressive metal. progressive metal. A signed version was released on December 25 , 2009 by Aural Music and it contained four bonus tracks .. A music video for `` Somnambulist '' has been released .. After recording the album , guitarist Robert `` Bob '' Warren parted ways with the band and Josh Ward stepped in to fill rhythm guitar duties .
not_related.