With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Boston has one of the highest costs of living in 2011.
text_B: N'Tsoudjini is a town located on the island of Grande Comore in the Comoros .. Grande Comore. Grande Comore. Comoros. Comoros. Category  : Populated places in Grande Comore. Grande Comore. Grande Comore
not_related.