With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Doug Ducey is the mayor of Phoenix.
text_B: Ilembula is a town and ward in Njombe district in the Iringa Region of the Tanzanian Southern Highlands .. Region. Regions of Tanzania. Iringa Region. Iringa Region. Njombe. Njombe. Its population according to the 2002 Tanzanian census is 18,126 .. 2002 Tanzanian census. Tanzanian census ( 2002 )
not_related.