With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: One of the world's largest football stadiums, Maracana Stadium, is in Rio de Janeiro.
text_B: Pseudocolaspis chrysites is a species of leaf beetle of the Democratic Republic of the Congo and Yemen observed by Gerstaecker in 1871 .. Pseudocolaspis. Pseudocolaspis. Gerstaecker. Carl Eduard Adolph Gerstaecker. leaf beetle. leaf beetle. Democratic Republic of the Congo. Democratic Republic of the Congo. Yemen. Yemen
not_related.