With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: San Francisco is Alcatraz Federal Penitentiary's location.
text_B: Littell is an unincorporated community in Lewis County , Washington , United States .. United States. United States. Washington. Washington ( state ). County. List of counties in Washington. Lewis. Lewis County, Washington. unincorporated community. unincorporated community. Lewis County. Lewis County, Washington
not_related.