Question: Elinor "Ellie" Walker was a fictional character on the sitcom airing on which network?

full_context: Document 1: Elsie Tanner: Elsie Gregory (also Grimshaw, Tanner and Howard) is a fictional character from the British ITV soap opera, "Coronation Street", played by Pat Phoenix from the series inception in 1960 to 1973 and from 1976 until 1984. Elsie Tanner was one of the original core characters on "Coronation Street" and appeared in the very first episode. She is considered something of an icon in soap history and regarded as one of "Coronation Street's" greatest ever characters.
Document 2: Andy Griffith: Andy Samuel Griffith (June 1, 1926 – July 3, 2012) was an American actor, television producer, Southern gospel singer, and writer. He was a Tony Award nominee for two roles, and gained prominence in the starring role in director Elia Kazan's film "A Face in the Crowd" (1957) before he became better known for his television roles, playing the lead roles of Andy Taylor in the sitcom "The Andy Griffith Show" (1960–1968) and Ben Matlock in the legal drama "Matlock" (1986–1995).
Document 3: Elinor &quot;Ellie&quot; Walker: Elinor "Ellie" Walker is a fictional character in the American television sitcom "The Andy Griffith Show". She is notable for being Andy Taylor's first regular girlfriend seen on the show. Ellie makes 12 appearances in the first season. Despite the paucity of her appearances, she was intended as a series regular. Unlike girlfriends that would follow, her portrayer, Elinor Donahue, is given opening credit billing, alongside Andy Griffith.
Document 4: Elinor Donahue: Mary Eleanor Donahue (born April 19, 1937), credited as Elinor Donahue, is an American actress, best remembered today for playing the role of Betty Anderson, the eldest child of Robert Young and Jane Wyatt, on the 1950s American sitcom "Father Knows Best".
Document 5: Aunt Bee: Aunt Bee is a fictional character from the 1960 American television sitcom "The Andy Griffith Show". Played by Frances Bavier, the character migrated to the spinoff "Mayberry R.F.D." (1968–1971) when "The Andy Griffith Show"ended its run in 1968, and remained for two years. Though she was the aunt of Sheriff Andy Taylor, virtually every character in Mayberry called her "Aunt Bee".
Document 6: List of The Andy Griffith Show episodes: This is a list of episodes from the CBS television comedy "The Andy Griffith Show". The first episode aired on October 3, 1960 and the final episode aired on April 1, 1968. There were 249 episodes in all, 159 in black and white (seasons 1–5) and 90 in color (seasons 6–8). The series was spun off from "The Danny Thomas Show", where Sheriff Andy Taylor was introduced in the episode, "Danny Meets Andy Griffith", which first aired on February 15, 1960.
Document 7: Andy Griffith: Andy Samuel Griffith (June 1, 1926 – July 3, 2012) was an American actor, television producer, Southern gospel singer, and writer. He was a Tony Award nominee for two roles, and gained prominence in the starring role in director Elia Kazan's film "A Face in the Crowd" (1957) before he became better known for his television roles, playing the lead roles of Andy Taylor in the sitcom "The Andy Griffith Show" (1960–1968) and Ben Matlock in the legal drama "Matlock" (1986–1995).
Document 8: Eleanor Bartlet: Eleanor "Ellie" Emily Bartlet Faison is a fictional character played by Nina Siemaszko on the television serial drama "The West Wing". Ellie is the middle daughter of President Josiah Bartlet and Abbey Bartlet.
Document 9: Ellie Snyder: Elinor "Ellie" Snyder (formerly Anderson) is a fictional character on the daytime soap opera "As the World Turns". She was portrayed by Renee Props from June 1988 to December 1992.
Document 10: The Andy Griffith Show: The Andy Griffith Show is an American situation comedy which aired on CBS from October 3, 1960, to September 6, 1971, with a total of 327 half-hour episodes spanning over 11 seasons, first in black and white and then in color, which partially originated from an episode of "The Danny Thomas Show". It originally starred Andy Griffith in the role of Andy Taylor, the widowed sheriff of the fictional small community of Mayberry, North Carolina. Other major characters include Andy's inept but well-meaning deputy, who is also his cousin, Barney Fife (Don Knotts); Andy's spinster aunt and housekeeper, "Aunt" Bee Taylor (Frances Bavier), and Andy's precocious young son, Opie (Ron Howard). Eccentric townspeople and temperamental girlfriends complete the cast. Regarding the tone of the show, Griffith said that despite a contemporary setting, the show evoked nostalgia, stating in a "Today Show" interview: "Well, though we never said it, and though it was shot in the '60s, it had a feeling of the '30s. It was, when we were doing it, of a time gone by."
Document 11: Barney Fife: Bernard "Barney" P. Milton Oliver Fife is a fictional character in the American television program "The Andy Griffith Show", portrayed by comic actor Don Knotts. Barney Fife is a deputy sheriff in the slow paced, sleepy southern community of Mayberry, North Carolina. He appeared in the first five seasons (1960–65) as a main character, and, after leaving the show at the end of season five, made a few guest appearances in the following three color seasons (1965–68). He also appeared in the first episode of the spin-off series "Mayberry R.F.D." (1968–1971), and in the 1986 reunion telemovie "Return to Mayberry". Additionally, Barney appeared in the "Joey Bishop Show" episode, "Joey's Hideaway Cabin" and the first episode of "The New Andy Griffith Show".
Document 12: Miss Ellie Ewing: Eleanor "Miss Ellie" Farlow (maiden name Southworth; formerly Ewing) is a fictional character, from the CBS soap opera "Dallas", a long running serial centered on the lives of the wealthy Ewing family in Dallas, Texas. Throughout her run, the character remains an important part of the show's structure. Created by writer David Jacobs, the role was originated by screen actress Barbara Bel Geddes in the series pilot episode until her departure in 1984. For the 1984–85 season, Bel Geddes was replaced by movie and television actress Donna Reed, who would only play the part for just that one season. Bel Geddes returned at the start of "Dallas"'s 1985–86 season and remained in the show until near the end of the 1989–90 season, when Bel Geddes wanted to retire from acting.
Document 13: Andy Taylor (The Andy Griffith Show): Sheriff Andrew "Andy" Jackson Taylor and in earlier episodes as Cousin Andy by Barney Fife is the major character on "The Andy Griffith Show", an American sitcom which aired on CBS, (1960–1968). He also appears in the "Gomer Pyle, U.S.M.C." episode "Opie Joins the Marines", made a cameo appearance in the USMC episode "Gomer Goes Home," five episodes of "Mayberry R.F.D." (1968–1971) and the reunion telemovie "Return to Mayberry" (1986). The character made his initial appearance in an episode of "The Danny Thomas Show" entitled "Danny Meets Andy Griffith." In the CBS special "The Andy Griffith - Don Knotts - Jim Nabors Show" (1965), Andy and Barney are featured in a musical sketch about their friendship and recreate some classic moments between the characters. Andy Griffith, as Sheriff Taylor, also has a brief comedy cameo in "Rowan and Martin at the Movies" (1969), a PSA short subject promoting the purchase of U.S. Savings Bonds. Andy Taylor appeared in all 249 episodes of "The Andy Griffith Show" and was played by comedian and actor Andy Griffith.
Document 14: Betty Lynn: Elizabeth Ann Theresa "Betty" Lynn (born August 29, 1926) is a former American actress. She is best known for her role as Thelma Lou, Deputy Barney Fife's girlfriend, on "The Andy Griffith Show".
Document 15: Ellen Miller (Lassie): Ellen Miller is a fictional character in the long-running television series "Lassie" (1954–1973). Ellen is a war widow living on a weatherbeaten midwestern farm with her young son Jeff and her father-in-law George Miller. The character was created by producer Robert Maxwell and Lassie trainer Rudd Weatherwax, and was portrayed in the series by Jan Clayton. Ellen makes her debut in the premiere episode, "The Inheritance" (1954) and her last appearance in the mid-fourth season episode, "Timmy's Family" (1957). Clayton was nominated for two Emmy Awards for her performances as Ellen Miller on "Lassie," and the series itself won two Emmys during her stint on the show.
ground_truth: CBS