With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Rio de Janeiro has beaches.
text_B: Oegoconia caradjai is a species of gelechioid moth .. Oegoconia. Oegoconia. species. species. gelechioid moth. gelechioid moth. It is known from most of Europe , except Fennoscandia and the north-east .. Fennoscandia. Fennoscandia. It is also found in New Zealand .. New Zealand. New Zealand. The wingspan is about 15 mm .. wingspan. wingspan. Adults are on wing from June to August in a single generation in western Europe .. Indoors , they can be observed till October .. The larvae feed on leaf litter , vegetable detritus , rotten leaves and can also be found in waste of straw in barns and stables .. Pupation takes place in a loose cocoon , covered with excrements amongst leaf litter .
not_related.