From the record
“The John and Daisy May Livingston Ranch, in Harding County, South Dakota near Sorum, South Dakota, was listed on the National Register of Historic Places in 1987. The part of the ranch which was listed included two contributing buildings and eight non-contributing ones on 4 acres (1.6 ha).”
Wikipedia article John and Daisy May Livingston Ranch, CC BY-SA 4.0.
One of 13 National Register listings published here for Harding County · listed in 1987 · category: Building · built in 1916.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service