With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The second Ku Klux Klan died out by the early 1870s.
text_B: USS Pecos may refer to  :. , a Kanawha-class fleet replenishment oiler , 1920 -- 1942. , a Suamico-class fleet replenishment oiler , 1942 -- 1946 ; with Military Sea Transportation Service , from 1950 ; struck 1974. , a U.S. Navy Henry J. Kaiser-class fleet replenishment oiler in service since 1989 .. Category  : United States Navy ship names
not_related.