Question: Which Native American group were the former inhabitants of the land where Mount Rushmore stands?
About the article "Mount Rushmore", section "Controversy".

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Mount Rushmore is controversial among Native Americans because the United States seized the area from the Lakota tribe after the Great Sioux War of 1876.
The Treaty of Fort Laramie from 1868 had previously granted the Black Hills to the Lakota in perpetuity.
Members of the American Indian Movement led an occupation of the monument in 1971, naming it "Mount Crazy Horse".
Among the participants were young activists, grandparents, children and Lakota holy man John Fire Lame Deer, who planted a prayer staff atop the mountain.
Lame Deer said the staff formed a symbolic shroud over the presidents' faces "which shall remain dirty until the treaties concerning the Black Hills are fulfilled.
"In 2004, the first Native American superintendent of the park was appointed.
Gerard Baker has stated that he will open up more "avenues of interpretation", and that the four presidents are "only one avenue and only one focus.
"The Crazy Horse Memorial is being constructed elsewhere in the Black Hills to commemorate the famous Native American leader and as a response to Mount Rushmore.
It is intended to be larger than Mount Rushmore and has the support of Lakota chiefs; the Crazy Horse Memorial Foundation has rejected offers of federal funds.
However, this memorial is likewise the subject of controversy, even within the Native American community.
Charles E. Rushmore (December 2, 1857 – October 31, 1931) was an American businessman and attorney for whom Mount Rushmore is named.
Born in New York City, he was the son of Edward Carmen Rushmore and Mary Eliza (née Dunn) Rushmore, of Tuxedo Park, NY.
He was married to the former Jeanette E. Carpenter.
In 1883, a tin mine, the Etta, was opened, which caused excitement among Eastern investors.
In 1885 Rushmore was in the Black Hills of South Dakota to check the titles to properties for an eastern mining company owned by James Wilson.
Although an Easterner, Rushmore quickly made friends among the miners and prospectors.
One day he was returning to headquarters of the Harney Peak Consolidated Tin Co., Ltd., located at Pine Camp, which was north of the great granite peak soon to bear his name.
With him were a local business man, and William W. Challis, a prospector and guide.
As they neared the mountain, Rushmore turned to Challis and asked its name.
Challis jestingly replied: "Never had any but it has now - we'll call the thing Rushmore."
According to rancher Jerry Urbanek, Rushmore returned to the Black Hills annually to hunt big game.
One day, while accompanied by Ted Brockett of Keystone, South Dakota, Rushmore asked the name of the mountain and was told that it was Slaughterhouse Rock.
Rushmore joked that his annual treks to the Hills had earned him the right to have the mountain named after himself.
"So just for the hell of it," Urbanek claimed, the locals started calling the hill Mount Rushmore.
Whatever the precise story, the United States Board of Geographic Names officially recognized the name "Mount Rushmore" in June 1930."
Forty years after the initial 1885 naming, Rushmore donated $5000 towards Gutzon Borglum's sculpture of the four presidents' heads on the mountain - the largest single contribution.
The Memorial was dedicated by President Coolidge on August 10, 1927.
Rushmore was also a member of the Phi Gamma Delta Fraternity. 
The theme of western expansion and the devastating effect this had on Native Americans is most prevalent within the setting of the film.
The Pine Ridge Reservation is in the shadow of Mount Rushmore, a gigantic monolith of American expansion and the desecration of sacred tribal grounds.
America's founding fathers were carved into a mountain sacred to the Sioux, highlighting the lack of respect by Euro-American cultures for Native Americans.
This theme becomes especially prevalent in the final scene, which takes place with Mount Rushmore hovering ominously in the background.
Another aspect of western expansion explored in the film is the fact that the location of the Wounded Knee Massacre is located on the Pine Ridge Reservation.
The mention of the massacre and the honoring of the members of the 7th Cavalry with Congressional Medals of Honor is a not so subtle dig at the suffering Native Americans experienced at the hands of Euro-Americans during their western expansion. 
The Mount Rushmore National Memorial is a sculpture carved into the granite face of Mount Rushmore (Lakota Sioux name: Six Grandfathers) near Keystone, South Dakota, in the United States.
Sculpted by Danish-American Gutzon Borglum and his son, Lincoln Borglum, Mount Rushmore features sculptures of the heads of four United States presidents: George Washington (1732–1799), Thomas Jefferson (1743–1826), Theodore Roosevelt (1858–1919), and Abraham Lincoln (1809–1865).
The entire memorial covers and is above sea level.
South Dakota historian Doane Robinson is credited with conceiving the idea of carving the likenesses of famous people into the Black Hills region of South Dakota in order to promote tourism in the region.
Robinson's initial idea was to sculpt the Needles; however, Gutzon Borglum rejected the Needles site because of the poor quality of the granite and strong opposition from Native American groups.
They settled on the Mount Rushmore location, which also has the advantage of facing southeast for maximum sun exposure.
Robinson wanted it to feature western heroes like Lewis and Clark, Red Cloud, and Buffalo Bill Cody, but Borglum decided the sculpture should have a more national focus and chose the four presidents whose likenesses would be carved into the mountain.
After securing federal funding through the enthusiastic sponsorship of "Mount Rushmore's great political patron," U.S.
Senator Peter Norbeck, construction on the memorial began in 1927, and the presidents' faces were completed between 1934 and 1939.
Upon Gutzon Borglum's death in March 1941, his son Lincoln Borglum took over construction.
Although the initial concept called for each president to be depicted from head to waist, lack of funding forced construction to end in late October 1941.
Mount Rushmore has become an iconic symbol of presidential greatness and has appeared in works of fiction, and has been discussed or depicted in other popular works.
It attracts nearly three million people annually. 
The construction of Mount Rushmore National Memorial took about 14 years, from 1927 to 1941.