With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Death in Paradise has received ratings.
text_B: The Maiden Tsar is a Russian folk tale .. folk tale. Fairy tale. It appeared in print in Alexander Afanasyev 's collection Russian Fairy Tales .. Alexander Afanasyev. Alexander Afanasyev. Russian Fairy Tales. Russian Fairy Tales
not_related.