With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Tanzania is on the eastern side of Africa.
text_B: Karlivka is a city in Karlivka Raion , Poltava Oblast , Ukraine .. Oblast. Oblasts of Ukraine. Raion. Raions of Ukraine. Poltava Oblast. Poltava Oblast. Karlivka Raion. Karlivka Raion. Ukraine. Ukraine. Population is .. Until the 1950s the city was known as Karlovka .
not_related.