With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Summertime (George Gershwin song) is a symphony composed in 1935.
text_B: NOTOC. This is a list of the National Register of Historic Places listings in Routt County , Colorado .. National Register of Historic Places. National Register of Historic Places. Routt County. Routt County, Colorado. Colorado. Colorado. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Routt County , Colorado , United States .. National Register of Historic Places. National Register of Historic Places. Routt County. Routt County, Colorado. Colorado. Colorado. United States. United States. The locations of National Register properties and districts for which the latitude and longitude coordinates are included below , may be seen in a map .. There are 26 properties and districts listed on the National Register in the county .. Another property was once listed but has been removed .
not_related.