With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Eddie Vedder is only a drummer.
text_B: `` Bart-Mangled Banner '' is the twenty-first episode of The Simpsons ' fifteenth season .. fifteenth season. The Simpsons ( season 15 ). It first aired on the Fox network in the United States on May 16 , 2004 .. Fox network. Fox Broadcasting Company
not_related.