answers: Black Kettle
context: Yellow Hawk Chief Yellow Hawk ("also known as Ci-tan-gi") was a leader of the Sans Arc Lakota (Itazipco) a sub-group of the Cheyenne River Sioux Native American tribe. In 1867 Yellow Hawk was a member of the delegation of Native American representatives who signed the Medicine Lodge Treaty and in 1868, the Treaty of Fort Laramie, protecting tribal lands from further seizure and encroachment by the United States Government. During the Lewis and Clark Expedition Yellow Hawk was a recipient of a Jefferson Peace Medal a later variety of Indian Peace Medals. Yellow Hawk married a non-Native American woman, Julia </s> Bent's brother Charlie Bent, and two Cheyenne women who were later turned over to William Bent. According to western author and historian Larry McMurtry the son of Chivington's scout John Smith (by an Indian mother) was in the camp, survived the attack and was "executed" afterwards. The Sand Creek Massacre resulted in a heavy loss of life, mostly among Cheyenne and Arapaho women and children. Hardest hit by the massacre were the Wutapai, Black Kettle's band. Perhaps half of the Hevhaitaniu were lost, including the chiefs Yellow Wolf and Big Man. The Oivimana, led by War Bonnet, lost about half </s> from Innamincka to Carraweena. This area also included Strzelecki Creek. The Yandruwandha played a significant role in key moments of the Burke and Wills expedition. Oral lore conserved among them, according to a descendant, Aaron Paterson, has it that William John Wills, who recorded some of their words, made a good impression on the elders, who provided him with shelter in a walpa shared with an as yet uninitiated youth. While Burke and Will died, the only man to survive, John King, did so because he found sanctuary with the Yandruwandha, among whom he was eventually found by Edwin Welch,
question: who was the leader of the indian tribe located at sand creek