With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Presidio County's unusual shape means that more of its borders face into Mexico than into the United States. The county is bounded on the east by Brewster County, on the north by Jeff Davis County, and on the south and west for by the Rio Grande and Mexico. Along the international border, the county faces the Manuel Benavides and Ojinaga Districts of the state of Chihuahua, Mexico, on the south side, and the municipality of Guadalupe of the State of Chihuahua, Mexico, on its southwestern side.
text_B: Would future historians note the shape of Presidio County and assume that the lines were drawn over open land simply for the sake of simplicity, rather than factors relating to population or politics.
NO.