Question: Who dies in the plane crash on greys?

Disambiguated questions and answers:
context: 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).
question: Who portrayed the character who dies in season 9 from injuries sustained in the plane crash on Grey's?
short_answers: Eric Dane
wikipage: Grey's Anatomy (season 9)
context: After their plane crashes in the woods, Dr. Meredith Grey (Ellen Pompeo), Dr. Lexie Grey (Chyler Leigh), Dr. Cristina Yang (Sandra Oh), Dr. Arizona Robbins (Jessica Capshaw), Dr. Derek Shepherd (Patrick Dempsey), and Dr. Mark Sloan (Eric Dane) desperately fight to stay alive. Meredith is relatively unscathed, while the rest have serious injuries: the pilot, Jerry (James LeGros), has a major spine injury, and Yang dislocates her arm. Robbins' femur is broken and sticking through the skin, Sloan has serious internal injuries; though initially adrenaline keeps him on his feet. Shepherd is sucked out the side of the plane and awakens alone in the wood; his mangled hand having been pushed through the door of the plane. However, none are in as bad shape as Lexie, who is crushed under a piece of the plane. While Meredith searches for Shepherd, Yang and Sloan try to move the debris off Lexie. Eventually, the two realize that they cannot save her, so Sloan holds her hand while she dies, telling her that he loves her. As Sloan tells her of the life the two were meant to have together, Lexie dies with a smile on her face just as Meredith and Yang are approaching. 
question: Who dies in season 9 from injuries sustained in the plane crash on Grey's?
short_answers: Dr. Mark Sloan
Mark Sloan
Mark Everett Sloan, M.D., F.A.C.S.
McSteamy
wikipage: Flight (Grey's Anatomy)
context: After their plane crashes in the woods, Dr. Meredith Grey (Ellen Pompeo), Dr. Lexie Grey (Chyler Leigh), Dr. Cristina Yang (Sandra Oh), Dr. Arizona Robbins (Jessica Capshaw), Dr. Derek Shepherd (Patrick Dempsey), and Dr. Mark Sloan (Eric Dane) desperately fight to stay alive. Meredith is relatively unscathed, while the rest have serious injuries: the pilot, Jerry (James LeGros), has a major spine injury, and Yang dislocates her arm. Robbins' femur is broken and sticking through the skin, Sloan has serious internal injuries; though initially adrenaline keeps him on his feet. Shepherd is sucked out the side of the plane and awakens alone in the wood; his mangled hand having been pushed through the door of the plane. However, none are in as bad shape as Lexie, who is crushed under a piece of the plane. While Meredith searches for Shepherd, Yang and Sloan try to move the debris off Lexie. Eventually, the two realize that they cannot save her, so Sloan holds her hand while she dies, telling her that he loves her. As Sloan tells her of the life the two were meant to have together, Lexie dies with a smile on her face just as Meredith and Yang are approaching. 
question: Who ultimately dies in the plane crash at the end of season 8 on Grey's?
short_answers: Alexandra Caroline Grey, M.D.
Dr. Lexie Grey
wikipage: Flight (Grey's Anatomy)
context: "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. 
question: Who portrayed the character who ultimately dies in the plane crash at the end of season 8 on Grey's?
short_answers: Chyler Leigh
wikipage: Flight (Grey's Anatomy)

Long-form answers:
knowledge: content: Grey's Anatomy is an American medical drama television series that premiered on March 27, 2005, on the American Broadcasting Company (ABC) as a mid-season replacement
wikipage: Grey's Anatomy
long_answer: Multiple characters died in the plane crash on the American medical drama television series, Grey's Anatomy. In the plane crash at the end of season 8, Dr. Lexie Grey, played by Chyler Leigh, dies after being crushed under a piece of the plane.  In season 9 Dr. Mark Sloan, played by Eric Dane, dies after sustaining injuries from the crash. 
knowledge: content: Chyler Leigh West (pronounced /ˈkaɪlər/ KY-lər; née Potts; born April 10, 1982), known professionally as Chyler Leigh, is an American actress, singer and model.
wikipage: Chyler Leigh
content: In the ninth-season premiere, it is discovered that Mark is on life support due to the extensive injuries he sustained in the plane crash and, as determined by his will, the machines would be turned off if he showed no signs of waking within 30 days.
wikipage: Mark Sloan (Grey's Anatomy) Storylines
content: Mark died shortly thereafter. 
wikipage: Mark Sloan (Grey's Anatomy) Storylines
content: Eric Dane (born Eric T. Melvin, November 9, 1972)[1][2] is an American actor.
wikipage: Eric Dane
long_answer: "Flight" is the twenty-fourth and final episode of the eighth season of the American television medical drama "Grey's Anatomy" in which six doctors from Seattle Grace Mercy West Hospital who are victims of an aviation accident fight to stay alive, but Dr. Lexie Grey ultimately dies. Chyler Leigh, an American actress, singer and model, plays Lexie Grey. In the ninth-season premiere Dr. Mark Sloan, played by American actor Eric Dane, is on life support due to the extensive injuries he sustained in the plane crash and, as determined by his will, the machines would be turned off if he showed no signs of waking within 30 days. Mark died shortly thereafter.