Question: Where did the Dakota tribe live in the place where Christina Yang went in season 9?

full_context: Document 1: Sandy Lake, Minnesota: Sandy Lake is an unincorporated community Native American village located in Turner Township, Aitkin County, Minnesota, United States. Its name in the Ojibwe language is "Gaa-mitaawangaagamaag", meaning "Place of the Sandy-shored Lake". The village is administrative center for the Sandy Lake Band of Mississippi Chippewa, though the administration of the Mille Lacs Indian Reservation, District II, is located in the nearby East Lake.
Document 2: Dakota people: The Eastern Dakota are the Santee (Isáŋyathi or Isáŋ - athi; ``knife ''+`` encampment'', ''dwells at the place of knife flint''), who reside in the eastern Dakotas, central Minnesota and northern Iowa. They have federally recognized tribes established in several places.
Document 3: Grey's Anatomy (season 9): The season follows the characters dealing with the aftermath of the season eight plane crash that claimed the life of Lexie Grey (Chyler Leigh) and upon rescue Mark Sloan (Eric Dane), who dies after sustaining injuries from the crash. Derek Shepherd (Patrick Dempsey) finds his surgical career in doubt after badly damaging his hand but Callie Torres (Sara Ramirez) ultimately manages to save his hand. The show's protagonist Meredith Grey (Ellen Pompeo) deals with the loss of her half - sister Lexie and later discovers that she is pregnant. Cristina Yang (Sandra Oh) who is severely traumatized upon rescue and later decides to take up her fellowship in Minnesota. Arizona Robbins (Jessica Capshaw) another survivor of the plane crash upon return realizes that her leg has to be amputated to save her life, reacts badly to this, becoming bitter and blaming her wife Callie and her former friend Alex Karev (Justin Chambers). To prevent the doctors' court case from being thrown out, Owen Hunt (Kevin McKidd) decides to divorce Yang, but the two agree to start again. The hospital itself becomes liable for the crash, putting its future in extreme doubt prompting the four crash survivors and Torres to purchase the hospital. Miranda Bailey (Chandra Wilson) marries her partner Ben Warren (Jason George), April Kepner (Sarah Drew) returns home to Ohio, but is brought back by Hunt to rejoin the hospital and she restarts her relationship with Jackson Avery (Jesse Williams).
Document 4: Jackson Avery: In the series 11 finale Kepner tells Avery that she is leaving with Owen Hunt to serve as a trauma surgeon in the Army; it will help her grieve for their son. Avery lets her go and wonders how he can deal with his own grief. After discussions over the phone via Facetime, Kepner tells Avery that she is extending her service time. The sound of gunfire and explosions are heard at April's base camp, leaving her to quickly terminate the call. On Valentine's Day, Kepner returns to the hospital, where she and Avery embrace in the foyer. In season 12, their marriage begins to fall apart and they grow estranged. In episode 11, they file for a civil divorce. After their divorce is completed, Kepner reveals that she is pregnant with Avery's child. In Season 14 Jackson begins a relationship with Maggie Pierce.
Document 5: Flight (Grey's Anatomy): ``Flight ''is the twenty - fourth and final episode of the eighth season of the American television medical drama Grey's Anatomy, and the show's 172nd episode overall. It was written by series creator Shonda Rhimes, and directed by Rob Corn. The episode was originally broadcast on the American Broadcasting Company (ABC) in the United States on May 17, 2012. In the episode, six doctors from Seattle Grace Mercy West Hospital who are victims of an aviation accident fight to stay alive, but Dr. Lexie Grey (Chyler Leigh) ultimately dies. Other storylines occur in Seattle where Dr. Richard Webber (James Pickens, Jr.) plans his annual dinner for the departing residents, Dr. Owen Hunt (Kevin McKidd) fires Dr. Teddy Altman (Kim Raver), and Dr. Miranda Bailey (Chandra Wilson) gets engaged.
Document 6: Lexie Grey: The character's focal storyline involved a romantic relationship with plastic surgeon Mark Sloan (Eric Dane). She sustained life - threatening injuries after an aviation accident, in the eighth - season finale, which ultimately ended in her death. The character's death resulted in mixed critical feedback and the reason given for the departure was Leigh's desire to spend more time with her family. Rhimes has characterized Lexie as being a dork, as well as having issues with saying how she feels. Leigh has been moderately well received by critics, and was among the cast to receive a Screen Actors Guild Award nomination for Outstanding Performance by an Ensemble in a Drama Series in 2007.
Document 7: Meredith Grey: Meredith is widowed when Derek is killed in a car accident and was taken to an understaffed hospital. The doctors failed to recognize his head injury in time and allowed personal conflicts to interfere. Derek is declared brain dead, and Meredith must go to the medical center to consent to remove him from life support, shortly before she's hit with the first waves of morning sickness. She tells Penny, the intern who was assigned to Derek that every doctor has ``that one ''patient who dies on their watch and haunts them forever and`` that one will make you work harder, and they make you better.''
Document 8: Cristina Yang: During her internship, Cristina has an on - off relationship with the chief of cardiothoracic surgery Preston Burke (Isaiah Washington) that leads to an accidental pregnancy. Yang schedules an abortion without telling him about the pregnancy due to Burke's behavior towards their lack of relationship status. However, Yang experiences an ectopic pregnancy and Burke discovers the pregnancy after Yang collapses from a burst fallopian tube. Burke and Yang begin a relationship in the aftermath of her miscarriage. After Burke is shot in the arm and develops a hand tremor, Yang helps him cover it up by developing a covert partnership wherein she performs most of his surgeries. Yang initially denies involvement during a confrontation, but then confesses everything to Richard Webber (James Pickens, Jr.), the chief of surgery. Yang's actions jeopardize Burke's chances of becoming chief, which he sees as a huge betrayal. After a short breakup, Yang breaks the silence and Burke proposes marriage, which Yang accepts after eight days of hesitation. Burke calls off the wedding, leaving Yang at the altar. She goes on her honeymoon to Hawaii with Meredith to recover, returning to discover that Burke has disappeared from her life and transferred to a different hospital.
Document 9: Corson County, South Dakota: The county is encompassed within the Standing Rock Indian Reservation, which extends into North Dakota. The Lakota people reside primarily in the South Dakota part of the reservation; the Yanktonai and Dakota live in that part in North Dakota. The Grand River, a tributary of the Missouri River, runs through the reservation.
Document 10: Tatanka Wind Farm: The 180 MW Tatanka Wind Farm, is located in Dickey County and McIntosh County, North Dakota, and McPherson County, South Dakota. It is the largest wind farm in North and South Dakota and generates enough renewable energy to power more than 60,000 U.S. homes.
Document 11: Fort Berthold: Fort Berthold was two sequential forts on the Missouri River in North Dakota, both of which began as fur trading posts. The second became a post for the U.S. Army and later became the Indian Agency for the Arikara, Hidatsa, and Mandan tribes. The sites are both now under Lake Sakakawea.
Document 12: Buffalo County, South Dakota: In 2010, the center of population of South Dakota was located in eastern Buffalo County. The Crow Creek Indian Reservation, inhabited by the Crow Creek Sioux Tribe makes up the majority of Buffalo County.
Document 13: Shakopee Mdewakanton Sioux Community: The Shakopee Mdewakanton Sioux Community (SMSC) (Dakota: Bdemayaṭo Oyate) is a federally recognized, sovereign Indian tribe of Mdewakanton Dakota people, located southwest of Minneapolis and Saint Paul, within parts of the cities of Prior Lake and Shakopee in Scott County, Minnesota. Mdewakanton, pronounced Mid-ah-wah-kah-ton, means "dwellers at the spirit waters."
Document 14: Derek Shepherd: In season 11, Derek is involved in a fatal car accident while driving to the airport for his final trip to Washington. He is able to hear and process auditory input, but unable to speak. He is recognized by Winnie, one of the victims of a crash he assisted in earlier, who tells the surgeons that their patient's name is Derek and that he is a surgeon as well. The hospital he was taken to was understaffed and his head injury was not detected quickly enough by the interns on duty that night. Although the neurosurgeon on call is paged multiple times, he takes too long to arrive and Derek is declared brain dead. Police arrive at Meredith's door and take her to see Derek, where she consents to removing him from life support. At the time of his death, Meredith was pregnant with their third child. She gives birth to a daughter whom she names Ellis after her mother.
Document 15: North Dakota: North Dakota is in the U.S. region known as the Great Plains. The state shares the Red River of the North with Minnesota to the east. South Dakota is to the south, Montana is to the west, and the Canadian provinces of Saskatchewan and Manitoba are to the north. North Dakota is situated near the middle of North America with a stone marker in Rugby, North Dakota marking the ``Geographic Center of the North American Continent ''. With an area of 70,762 square miles (183,273 km), North Dakota is the 19th largest state.
ground_truth: central Minnesota
sub_queries: where does christina yang go in season 9 Answer: Minnesota
where did the dakota tribe live in Minnesota Answer: central Minnesota