With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Frank Sinatra performed in San Francisco.
text_B: South Fulton is a city in Obion County , Tennessee , United States .. United States. United States. Tennessee. Tennessee. County. List of counties in Tennessee. Obion. Obion County, Tennessee. Obion County. Obion County, Tennessee. The population was 2,354 at the 2010 census .. United States Census, 2010. 2010 census. United States Census, 2010. It is part of the Union City , TN -- KY Micropolitan Statistical Area .. City. City. Union City. Union City, Tennessee. Kentucky. Micropolitan Statistical Area. Union City micropolitan area
not_related.