With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Nelson Mandela was an advocate for a classless society.
text_B: Izmaylovo District is a district in Eastern Administrative Okrug of the federal city of Moscow , Russia .. Moscow. Moscow. district. administrative divisions of Moscow. Eastern Administrative Okrug. Eastern Administrative Okrug. federal city. federal cities of Russia. Russia. Russia. Population  :. It is a historical part of Moscow , the ancestral land of the Romanov noble family .. Moscow. Moscow. Romanov noble family. House of Romanov
not_related.