With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ava DuVernay is a film distributor.
text_B: Samba is one of the six urban districts that make up the municipality of Luanda in Luanda Province , Angola .. municipality of Luanda. Luanda Municipality. Luanda Province. Luanda ( province ). Angola. Angola. Category  : Luanda. Category  : Municipalities in Luanda. Category  : Populated places in Luanda Province. Luanda Province. Luanda ( province )
not_related.