With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Slash is once again a member of Guns N' Roses.
text_B: Oblong Industries is a computer user-interface company based in Los Angeles , CA which develops conference room telecollaboration systems which respond to gestural input .. user-interface. user-interface. conference room. conference room. telecollaboration. telecollaboration
not_related.