With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Tanzania is a country with more than one language.
text_B: North Fork Valley Rural Historic District is a national historic district located near Blacksburg , Montgomery County , Virginia .. historic district. Historic district ( United States ). Blacksburg. Blacksburg, Virginia. The district encompasses 125 contributing buildings , 5 contributing sites , and 18 contributing structures .. It consists of a significant rural landscape and an important collection of domestic and agricultural buildings , reflecting important agricultural practices in the region from 1745-1940 .. It includes domestic and agricultural buildings , a historic archaeological site , as well as an early-20th century school , two late-19th century churches , and five mid - to late-19th century industrial resources including three standing mills , a tanyard site , and a brick kiln site .. archaeological site. archaeological site. It was listed on the National Register of Historic Places in 1991 .. National Register of Historic Places. National Register of Historic Places
not_related.