With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Houston economy has a base in transportation.
text_B: Nelson Township is a civil township in Barnes County , North Dakota , USA .. civil township. civil township. Barnes County. Barnes County, North Dakota. North Dakota. North Dakota. USA. United States. As of the 2000 census , its population was 61 .. 2000 census. United States Census, 2000
not_related.