With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Little Boy was the name for an atomic particle.
text_B: `` Weight of Love '' is a song by American rock band The Black Keys .. The Black Keys. The Black Keys. It was released as the fifth single from their eighth studio album Turn Blue on January 27 , 2015 and is the opening track on the album .. Turn Blue. Turn Blue ( album )
not_related.