Question: Lexie Grey is a part of the ABC medical drama series that began airing on what date?

full_context: Document 1: Chyler Leigh: Chyler Leigh West (pronounced ; "née" Potts; born April 10, 1982), known professionally as Chyler Leigh, is an American actress, singer and model, best known for her portrayals of Janey Briggs in "Not Another Teen Movie" and Dr. Alexandra "Lexie" Grey in the ABC medical drama "Grey's Anatomy". In October 2015, she began starring, in a lead role, in the CBS/CW show "Supergirl" as Alexandra "Alex" Danvers.
Document 2: Grey's Anatomy: Grey's Anatomy is an American medical drama television series that premiered on American Broadcasting Company (ABC) as a mid-season replacement on March 27, 2005. The series focuses on the fictional lives of surgical interns, residents, and attending physicians, as they evolve into seasoned doctors while trying to maintain personal lives and relationships. The title is a play on "Gray's Anatomy", a human anatomy textbook by Henry Gray.
Document 3: Grey's Anatomy (season 8): The eighth season of the American television medical drama Grey's Anatomy, commenced airing on the American Broadcasting Company (ABC) on September 22, 2011, with a special two-hour episode and ended on May 17, 2012 with the eighth season having a total of 24 episodes. The season was produced by ABC Studios, in association with ShondaLand Production Company and The Mark Gordon Company, and overseen by showrunner Shonda Rhimes.
Document 4: April Kepner: April Kepner M.D., is a fictional character from the television medical drama "Grey's Anatomy" which airs on the American Broadcasting Company (ABC) in the United States. The character was created by series producer Shonda Rhimes and is portrayed by actress Sarah Drew. She was introduced in the episode "Invasion" as a former surgical resident at Mercy West Hospital who joins the staff at Seattle Grace Mercy West after the two hospitals merge to compensate for the absence of some of the central cast members, and was created to be disliked by her colleagues. The character was originally set to appear in two episodes, Drew's contract was extended to the remainder of the sixth season, with her becoming a series regular in the seventh season. The character's focal storyline involved her struggle with fitting into the new work environment, her religious beliefs and balancing her duties as the hospital's chief resident and her friendship with her colleagues and as of the end of season eight, her relationship with her best friend and now ex-husband Jackson Avery.
Document 5: Sadie Harris: Sadie Harris was a recurring fictional character from the American television medical drama "Grey's Anatomy", which airs on the American Broadcasting Company (ABC) in the United States. The character was created by series producer Shonda Rhimes and portrayed by actress Melissa George. Introduced as a surgical intern who has an old companionship with the series' protagonist Meredith Grey (Ellen Pompeo), she eventually forms a friendship with Lexie Grey (Chyler Leigh), and departs after it is revealed she cheated her way into the surgical program.
Document 6: Grey's Anatomy (season 2): The second season of the American television medical drama Grey's Anatomy commenced airing on the American Broadcasting Company (ABC) on September 25, 2005, and concluded on May 15, 2006. The season was produced by Touchstone Television, in association with Shondaland production company and The Mark Gordon Company, the showrunner being Shonda Rhimes. Actors Ellen Pompeo, Sandra Oh, Katherine Heigl, Justin Chambers, and T.R. Knight reprised their roles as surgical interns Meredith Grey, Cristina Yang, Izzie Stevens, Alex Karev, and George O'Malley, respectively. Previous main cast members Chandra Wilson, James Pickens, Jr., Isaiah Washington, and Patrick Dempsey also returned, while Kate Walsh, who began the season in a recurring capacity, was promoted to series regular status, after appearing in seven episodes as a guest star.
Document 7: Jackson Avery: Jackson Avery, M.D. is a fictional character from ABC prime time medical drama, "Grey's Anatomy", portrayed by actor Jesse Williams. The character was created by series creator and executive producer, Shonda Rhimes. He was introduced in season six, episode 5, "Invasion" as a former surgical resident from "Mercy West Medical Center" when it merges with "Seattle Grace Hospital". Williams initially appeared as a recurring cast member, and was later promoted to a series regular in season seven. The character's focal storyline involved his attempt to fit in at his new work environment, and trying to finding his own successes, instead of riding on the coattails of his famous family name. The character has also had significant romances with Lexie Grey and Stephanie Edwards. He was married but is now divorced to April Kepner. The couple had a child, Samuel Avery, who died soon after birth. However, the pair have a daughter, Harriett, who was not named after Catherine much to her dismay. She was conceived prior to the divorce. Dr. Avery later becomes a member of the board of directors at the newly established, "Grey Sloan Memorial Hospital", and is the current chairman.
Document 8: Grey's Anatomy (season 14): The fourteenth season of the American television medical drama "Grey's Anatomy" was ordered on February 10, 2017, by American Broadcasting Company (ABC), and premiered on September 28, 2017 with a special two-hour premiere. The season will consist of 24 episodes, with the season's seventh episode marking the 300th episode for the series overall. The season is produced by ABC Studios, in association with ShondaLand Production Company and The Mark Gordon Company; the showrunner being Shonda Rhimes.
Document 9: 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 10: Lexie Grey: Alexandra Caroline "Lexie" Grey, M.D. is a fictional character from the medical drama television series "Grey's Anatomy", which airs on ABC in the United States. The character was created by series' producer Shonda Rhimes and was portrayed by actress Chyler Leigh from the third through eighth seasons. She was introduced as a surgical intern in season three. Serving as Meredith Grey (Ellen Pompeo)'s half sister, she transferred to the fictional Seattle Grace Hospital, after her mother's sudden death. Eventually named a surgical resident, the character was originally contracted to appear for a multi-episode story arc, but received star billing in the fourth season.
Document 11: Grey's Anatomy (season 3): The third season of the American television medical drama Grey's Anatomy, commenced airing on the American Broadcasting Company (ABC) on September 21, 2006, and concluded on May 17, 2007. The season was produced by Touchstone Television, in association with Shondaland Production Company and The Mark Gordon Company, the showrunner being Shonda Rhimes. Actors Ellen Pompeo, Sandra Oh, Katherine Heigl, Justin Chambers, and T.R. Knight reprised their roles as surgical interns Meredith Grey, Cristina Yang, Izzie Stevens, Alex Karev, and George O'Malley, respectively, continuing their expansive storylines as focal points throughout the season. Previous main cast members Chandra Wilson, James Pickens, Jr., Kate Walsh, Isaiah Washington, and Patrick Dempsey also returned, while previous guest stars Sara Ramirez and Eric Dane were promoted to series regulars, following the extension of their contracts.
Document 12: Grey's Anatomy (season 4): The fourth season of the American television medical drama Grey's Anatomy, commenced airing in the United States on September 27, 2007 and concluded on May 22, 2008. The season continues the story of a group of surgeons and their mentors in the fictional Seattle Grace Hospital, describing their professional lives and the way they affect the personal background of each character. Season four had twelve series regulars with ten of them returning from the previous season, out of which eight are part of the original cast from the first season. The season aired in the Thursday night timeslot at 9:00 EST. In addition to the regular seventeen episodes, a clip-show narrated by the editors of "People" recapped previous events of the show and made the transition from "Grey's Anatomy" to "Private Practice", a spin-off focusing of Dr. Addison Montgomery and aired on September 19, 2007, before the season premiere. The season was officially released on DVD as a five-disc boxset under the title of "Grey's Anatomy: Season Four – Expanded" on September 9, 2008 by Buena Vista Home Entertainment.
Document 13: Grey's Anatomy (season 1): The first season of the American television medical drama Grey's Anatomy, began airing in the United States on the American Broadcasting Company (ABC) on March 27, 2005, and concluded on May 22, 2005. The first season introduces the main character, Meredith Grey, as she enrolls in Seattle Grace Hospital's internship program and faces unexpected challenges and surprises. Season one had nine series regulars, four of whom have been part of the main cast ever since. The season initially served as a mid-season replacement for the legal drama "Boston Legal", airing in the Sunday night time slot at 10:00, after "Desperate Housewives". Although no clip shows have been produced for this season, the events that occur are recapped in "Straight to Heart", a clip-show which aired one week before the winter holiday hiatus of the second season ended. The season was officially released on DVD as two-disc Region 1 box set under the title of "Grey's Anatomy: Season One" on February 14, 2006, by Buena Vista Home Entertainment.
Document 14: Grey's Anatomy (season 5): The fifth season of the American television medical drama Grey's Anatomy, created by Shonda Rhimes, commenced airing on American Broadcasting Company (ABC) in the United States on September 25, 2008 and concluded on May 14, 2009 with twenty-four aired episodes. The season follows the story of a group of surgeons as they go through their residency, while they also deal with the personal challenges and relationships with their mentors. Season five had thirteen series regulars with twelve of them returning from the previous season. The season aired in the Thursday night timeslot at 9:00 pm. The season was officially released on DVD as seven-disc boxset under the title of "Grey's Anatomy: The Complete Fifth Season – More Moments" on September 9, 2009 by Buena Vista Home Entertainment.
Document 15: Stephanie Edwards (Grey's Anatomy): Stephanie Edwards, M.D. is a fictional character from the medical drama television series "Grey's Anatomy", which airs on the American Broadcasting Company (ABC) in the United States. The character was created by series producer Shonda Rhimes, and was portrayed by actress Jerrika Hinton from 2012 to 2017. Introduced as a surgical intern at the fictional Seattle Grace Mercy West Hospital, later renamed Grey Sloan Memorial Hospital, Stephanie works her way up to resident level with fellow intern and friend, Jo Wilson (Camilla Luddington).
ground_truth: March 27, 2005