With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Portugal has an agricultural society.
text_B: The Ant Flat Ranger Station is a site on the National Register of Historic Places located 2 miles south of Fortine , Montana in Kootenai National Forest .. National Register of Historic Places. National Register of Historic Places. Kootenai National Forest. Kootenai National Forest. It was added to the Register on December 30 , 1996 .
not_related.