Question: On what date did the massacre in which the Piegan warrior known as "kyaiyotokan" survived occur?
Sentence (from "Marias Massacre"): The Marias Massacre (also known as the Baker Massacre or the Piegan Massacre) was a massacre of a friendly band of Piegan Blackfeet Indians on January 23, 1870, by the United States Army in Montana Territory during the Indian Wars.
Relevant evidence: Yes