With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Philadelphia is the origin of the United States Marine Corps.
text_B: Roaring Fork is an unincorporated community and coal town located in Wise County , Virginia , United States .. United States. United States. Virginia. Virginia. County. List of counties in Virginia. Wise. Wise County, Virginia. unincorporated community. unincorporated community. coal town. coal town
not_related.