Question: What character did Sarah Chalke play on the most watched television show in the United States from 1989 to 1990?

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: Roseanne Conner: Roseanne Conner (née Harris) is the title character and the main protagonist of "Roseanne", she is played by Roseanne Barr. Roseanne, in a takeoff of her stand-up comedic and presumed real-life persona, is a bossy, loud, caustic, overweight, and dominant woman. She constantly tries to control the lives of her sister, husband, children, co-workers, and friends. Despite her dominating nature, Roseanne is a loving mother who works hard and makes as much time for her kids as possible.
Document 3: Sarah Hyland: Sarah Jane Hyland (born November 24, 1990) is an American actress. Born in New York City, Hyland attended the Professional Performing Arts School in Manhattan, followed by small roles in the films "Private Parts" (1997), "Annie" (1999), and "Blind Date" (2007). She gained her first major role as Haley Dunphy on the ABC sitcom "Modern Family", for which she has received critical acclaim and numerous accolades and nominations, sharing four Screen Actors Guild Award for Outstanding Performance by an Ensemble in a Comedy Series with her cast members and garnering a Critics' Choice Television Award nomination Best Supporting Actress in a Comedy Series.
Document 4: Roseanne: Roseanne is an American sitcom that was broadcast on ABC from October 18, 1988, to May 20, 1997. Lauded for its realistic portrayal of the average American family, the series stars Roseanne Barr, and revolves around the Conners, an Illinois working-class family. The series reached #1 in the Nielsen ratings, becoming the most watched television show in the United States from 1989 to 1990. The show remained in the top four for six of its nine seasons, and in the top twenty for eight seasons.
Document 5: Kate Walsh (actress): Kathleen Erin Walsh (born October 13, 1967) is an American actress and businesswoman. Her roles include Dr. Addison Montgomery on the ABC television dramas "Grey's Anatomy" and "Private Practice", Rebecca Wright on the short-lived NBC sitcom "Bad Judge", and Olivia Baker on the Netflix drama series "13 Reasons Why".
Document 6: Sara Gilbert: Sara Gilbert (born Sara Rebecca Abeles; January 29, 1975) is an American actress, best known for her role as Darlene Conner on the ABC sitcom "Roseanne" from 1988 to 1997, for which she received two Primetime Emmy Award nominations. Gilbert will reprise the role in 2018 for an eight episode revival. She is also co-host and creator of the CBS daytime talk show "The Talk" and has had a recurring role as Leslie Winkle on CBS's "The Big Bang Theory".
Document 7: Kerry Bishé: Kerry Lynne Bishé (born May 1, 1984) is a New Zealand-born American actress, known for her lead role as Donna Clark in the AMC television series "Halt and Catch Fire". Bishé played the lead/narrator role on the final season of ABC's medical sitcom "Scrubs" and starred in the critically acclaimed drama film "Argo".
Document 8: 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).
Document 9: Sarah Chalke: Sarah Chalke ( ; born August 27, 1976) is a Canadian actress. She is known for portraying Dr. Elliot Reid on the NBC/ABC comedy series "Scrubs", the second Rebecca "Becky" Conner on the ABC sitcom "Roseanne", Stella Zinman on the CBS sitcom "How I Met Your Mother", and Beth Smith on Adult Swim's adult animated science-fiction series "Rick and Morty". She also had a recurring role on the third season of the ABC/TBS sitcom "Cougar Town".
Document 10: The Real Roseanne Show: The Real Roseanne Show is a reality show that aired briefly in 2003 about actress and comedian Roseanne Barr hosting a cooking show, called "Domestic Goddess". It premiered on ABC on August 6, 2003 to 5.5 million viewers.
Document 11: Roseanne Barr: Roseanne Cherrie Barr (born November 3, 1952) is an American actress, comedian, writer, and television producer. She was also the 2012 presidential nominee of the California-based Peace and Freedom Party. Barr began her career in stand-up comedy at clubs before gaining fame for her role in the hit television sitcom "Roseanne". The show ran for nine seasons, from 1988 to 1997. She won both an Emmy and a Golden Globe Award for Best Actress for her work on the show. It was announced in 2017 that an eight episode revival of the show will air in 2018. Barr had crafted a "fierce working-class domestic goddess" persona in the eight years preceding her sitcom and wanted to do a realistic show about a strong mother who was not a victim of patriarchal consumerism.
Document 12: The Roseanne Show: The Roseanne Show is a syndicated talk show hosted by American actress Roseanne Barr following the end of her long-running sitcom. The show featured Roseanne interviewing a mixture of quirky guests along with Roseanne's signature style of brassy, in-your-face, domestic goddess comedy."The Roseanne Show" was the first to be recorded digitally. During the show's run there were also live call-ins from viewers and celebrities. Sometimes during a taping there was a webchat during the taping and after the show. The set of the show consisted of a living room, a kitchen, and a garden scene. The set rotated to present a different interview setting. The show also featured skits with audience member participation. Skits included "Judge Roseanne", "The Dr. is In-sane" and a dating game-esque skit. Some skits also included her producer Mary Pelloni. Throughout the show's entire two-year run, Dailey Pike was Roseanne's warmup guy and sidekick regular on the show. In season one, Zach Hope was Roseanne's cyber sidekick. Later in season two, Michael Fishman, who portrayed D.J. Conner on "Roseanne", replaced Hope as Roseanne's cyber sidekick.
Document 13: Yvonne Strahovski: Yvonne Jaqueline Strzechowski (born 30 July 1982), known professionally as Yvonne Strahovski ( ), is an Australian actress. She is best known for her roles as CIA Agent Sarah Walker in the NBC series "Chuck" (2007–2012), Hannah McKay in the Showtime series "Dexter" (2012–2013) and CIA Agent Kate Morgan in the Fox event series "" (2014). She currently stars as Serena Joy Waterford in the Hulu series "The Handmaid's Tale" (2017–present).
Document 14: Dan Conner: Dan Conner is a primary fictional character in the "Roseanne" television series. He is the husband to fellow primary character Roseanne Conner, and father to two daughters Darlene and Becky Conner, and two sons D.J. Conner and Jerry Garcia Conner. He is portrayed by John Goodman.
Document 15: Roseanne's Nuts: Roseanne's Nuts is a Lifetime reality show/docudrama that aired from July 13, 2011, to September 16, 2011. It featured Roseanne Barr, her partner Johnny Argent and son Jake Pentland as they live on their macadamia nut and livestock farm in Hawaii. Celebrity guests included: Bonnie Bramlett, Michael Fishman, Phyllis Diller, and Sandra Bernhard.
ground_truth: the second Rebecca "Becky" Conner