Question: Sarah Drew had which role on the ABC drama Grey's Anatomy?

Context paragraphs:
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.

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.

Sarah Drew: Sarah Drew (born October 1, 1980) is an American actress.  She is known for playing Hannah Rogers in The WB family drama series "Everwood" (2004–2006) and Dr. April Kepner in the ABC medical drama series "Grey's Anatomy" (2009–present).

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.

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.

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.

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.

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.

Something Against You (Grey's Anatomy): "Something Against You" is the seventh episode of the twelfth season of the American television medical drama "Grey's Anatomy", and the 252nd episode overall.  It aired November 12, 2015 on ABC in the United States.  The episode was written by Andy Reaser and directed by Geary McLeod.  On its initial airing the episode was watched by 8.02 million viewers and opened up to mixed reviews from television critics with praise going to the performance of Kevin McKidd and Ellen Pompeo and the focus brought on their characters while criticism was faced by the writers for the storylines in particular the arcs involving Sarah Drew and Jesse Williams's and Samantha Sloyan's characters.

Fred Einesman: Fred Einesman is a physician and television writer/producer.  He is currently an Executive Producer on the ABC television drama Grey's Anatomy.  Previously he was the medical supervisor for the popular television medical drama "ER" and was the Co-Executive producer of the ABC drama Private Practice.  Dr. Einesman trained at the Faculty of Medicine at McGill University and completed a residency and fellowship in Emergency Medicine at UCLA.  He also received an MFA in Film Production from the University of Southern California.  He has consulted on a large number of Hollywood screen and television productions.

Supporting paragraphs: Sarah Drew April Kepner
Answer: April Kepner M.D.