question: When was the massacre occured in which "kyáiyótokan" was a survivor?
answer: January 23, 1870
context: Title: Resident Evil Survivor 2 Code: Veronica
  Passage: Resident Evil Survivor 2 Code: Veronica, known in Japan as Gun Survivor 2 Biohazard Code: Veronica (ガンサバイバー2バイオハザードコード：ベロニカ , Gan Sabaibā Tsū Baiohazādo Kōdo: Beronika ) , is a light gun shooter video game developed and published by Capcom and the 7th installment of the "Resident Evil" series.  The arcade version was developed in conjunction with Namco for the arcade machines.  The game was released for PlayStation 2 and the Namco System 246.  It was released on the PlayStation 2 on November 8, 2001 in Japan and in Europe on March 22, 2002.  The game is the second installment in the "Gun Survivor" series and sequel to "Resident Evil Survivor".  The game is adapted from "" and features enemies and characters from that game, and enemies from "Resident Evil 2" and "".
  Title: Joseph Horn Cloud
  Passage: Joseph Horn Cloud born 1873 and died September 18, 1920.  His father was Horn Cloud and mother Nest, both parents died at the Wounded Knee Massacre along with two brothers William Horn Cloud (1876-1890), Sherman Horn Cloud (1865-1890) and a niece.  Joseph was a survivor of the massacre as well as his brother Daniel and half brother Dewey Beard [p. 89-95].  Dewey's mother was Yellow Leaf who also died during the massacre.  In the early 1900s a writer named Eli S. Ricker began research for a book he was going to call "The Final Conflict between the Red Men and the Palefaces."  He gathered sources and interviews about conditions and battles on the Plains during the last half of the 1800s.  He recorded the interviews in small note pads known to historians as the "Ricker Tablets."  One such interview was with Joseph telling Ricker what he witnessed at the Wounded Knee Massacre, "When the shooting began the women ran to the ravine.  The shooting was in every direction.  Soldiers shot into one another... Many of the Indians in the circle were killed.  Many of them mingled with the soldiers behind them, picking up guns from dead soldiers and taking cartridge belts."
  Title: Survivor: Borneo
  Passage: Survivor: Borneo is the first season of the American CBS competitive reality television series "Survivor".  It was originally broadcast under the name Survivor but its official title was changed to Survivor: Pulau Tiga to distinguish it from subsequent installments of the series, and then changed again to "Survivor: Borneo".  The show filmed from March 13, 2000 through April 20, 2000 and premiered on May 31, 2000.  Hosted by Jeff Probst, it consisted of 39 days of gameplay with 16 competitors.  It was set in the South China Sea on the remote Malaysian island of Pulau Tiga in the state of Sabah, about 6 mi off the north coast of Borneo, Malaysia.
  Title: Stagg Field
  Passage: Amos Alonzo Stagg Field is the name of two different football fields for the University of Chicago.  The earliest Stagg Field (1893-1957) is probably best remembered for its role in a landmark scientific achievement by Enrico Fermi during the Manhattan Project.  The site of the first artificial nuclear chain reaction, which occured within the west viewing stands structure, received designation as a National Historic Landmark on February 18, 1965.  On October 15, 1966, which is the day that the National Historic Preservation Act of 1966 was enacted creating the National Register of Historic Places, it was added to that as well.  The site was named a Chicago Landmark on October 27, 1971.
  Title: Survivor Croatia
  Passage: Survivor: Odisejev Otok, was the first and only season of the Croatian version of the Swedish show Expedition Robinson, or Survivor and it aired 2005.  Having been influenced by the success of the Croatian version of Big Brother, channel HRT decided to launch a Croatian version of Survivor which aired from May 12, 2005 to July 7, 2005.  An immediate twist this season was that each tribe was forced to take part in an elimination challenge on day one of the competition.  As Ivan Krželj of the "Ammos" tribe (named after the Greek word for sand) and Ana Marija Bojko of the "Petros" tribe (named after the Greek word for rock) lost the challenge they were both eliminated from the competition.  Throughout the rest of the pre-merge portion of the competition the tribes battled for a majority when the merge arrived.  As many of them were considered weak by their tribes, most of the women were eliminated during this portion of the competition.  When the merge arrived, the two tribes became one known as "Zoi" and the former members of Ammos found themselves out numbered six to four.  Due to this, all of the former members of Ammos, with the exception of Silvija Zelko, were almost immediately eliminated.  When it came time for the final four, the contestants competed in two challenges in order to determine the final two.  As the winner of the first challenge, Vazmenko Pervanu chose to eliminate the only non-former Petros member Silvija Zelko.  Kristina Sesar, Vazmenko Pervanu, and Vedran Rubrik Šehić were then forced to compete in a second challenge which Vedran Rubrik Šehić won and chose to eliminate Kristina Sesar, who many considered to be the villain of the season.  Unlike most versions of Survivor, the public, not the jury, chose the winner and despite the fact that Vedran Rubrik Šehić won the jury vote by a margin of 4-3, it was Vazmenko Pervanu who won this season with a public vote of 68.23% to Vedran Rubrik Šehić's 31.77%.  Due to low ratings Survivor was cancelled following this season.
  Title: Marias Massacre
  Passage: 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.  About 200 Indians were killed, mostly women, children, and elderly men.
  Title: Survivor: Odisejev Otok
  Passage: Survivor: Odisejev Otok, was the first and only season of the Croatian version of the Swedish show Expedition Robinson, or Survivor and it aired 2005.  Having been influenced by the success of the Croatian version of Big Brother, channel HRT decided to launch a Croatian version of Survivor which aired from May 12, 2005 to July 7, 2005.  An immediate twist this season was that each tribe was forced to take part in an elimination challenge on day one of the competition.  As Ivan Krželj of the "Ammos" tribe (named after the Greek word for sand) and Ana Marija Bojko of the "Petros" tribe (named after the Greek word for rock) lost the challenge they were both eliminated from the competition.  Throughout the rest of the pre-merge portion of the competition the tribes battled for a majority when the merge arrived.  As many of them were considered weak by their tribes, most of the women were eliminated during this portion of the competition.  When the merge arrived, the two tribes became one known as "Zoi" and the former original members of Ammos found themselves out numbered six to four.  Due to this, all of the former members of Ammos, with the exception of Silvija Zelko, were almost immediately eliminated.  When it came time for the final four, the contestants competed in two challenges in order to determine the final two.  As the winner of the first challenge, Vazmenko Pervanu chose to eliminate the only non-former Petros member Silvija Zelko.  Kristina Sesar, Vazmenko Pervanu, and Vedran Rubrik Šehić were then forced to compete in a second challenge which Vedran Rubrik Šehić won and chose to eliminate Kristina Sesar, who many considered to be the villain of the season.  Unlike most versions of Survivor, the public, not the jury, chose the winner and despite the fact that Vedran Rubrik Šehić won the jury vote by a margin of 4-3, it was Vazmenko Pervanu who won this season with a public vote of 68.23% to Vedran Rubrik Šehić's 31.77%.  Due to low ratings Survivor was cancelled following this season.
  Title: Bearhead Mountain (Montana)
  Passage: Bearhead Mountain (8406 ft ) is located in the Lewis Range, Glacier National Park in the U.S. state of Montana.  The mountain is named for "kyáiyótokan", a Piegan warrior known for his war against the dreaded Assiniboine "White Dog".  "kyáiyótokan" was also a survivor of the Marias Massacre and the brother of "Chief Heavy Runner" a confidant of Glacier author James Willard Schultz.
  Title: Survivor guilt
  Passage: Survivor guilt (or survivor's guilt; also called survivor syndrome or survivor's syndrome) is a mental condition that occurs when a person believes they have done something wrong by surviving a traumatic event when others did not.  It may be found among survivors of murder, terrorism, combat, natural disasters, epidemics, among the friends and family of those who have died by suicide, and in non-mortal situation.  The experience and manifestation of survivor's guilt will depend on an individual's psychological profile.  When the "Diagnostic and Statistical Manual of Mental Disorders IV" (DSM-IV) was published, survivor guilt was removed as a recognized specific diagnosis, and redefined as a significant symptom of post traumatic stress disorder (PTSD).
  Title: Survivor NZ: Nicaragua
  Passage: Survivor NZ: Nicaragua is the first season of "Survivor NZ", a television series based on the popular reality game show "Survivor".  The series was announced in February 2016, and premiered on TVNZ 2 on 7 May 2017.  The season was filmed in Nicaragua, the same location as four seasons of the American edition of "Survivor": "", "", "" and "".
citations: Marias Massacre Bearhead Mountain (Montana)