Question: Cliff Clavin was a character on the show that was produced by what company?

full_context: Document 1: Happy Days: Happy Days is an American television sitcom that aired first-run from January 15, 1974, to September 24, 1984 on ABC, with a total of 255 half-hour episodes spanning over eleven seasons. Created by Garry Marshall, the series presented an idealized vision of life in the mid-1950s to mid-1960s Midwestern United States, and starred Ron Howard as teenager Richie Cunningham, Henry Winkler as his friend Arthur "Fonzie"/"The Fonz" Fonzarelli, and Tom Bosley and Marion Ross as Richie's parents, Howard and Marion Cunningham. "Happy Days" became one of the biggest hits in television history and heavily influenced the television style of its time.
Document 2: Give Me a Ring Sometime: "Give Me a Ring Sometime" is the first episode of the American situation comedy "Cheers". Written by Glen and Les Charles and directed by James Burrows, the episode first aired September 30, 1982 on NBC. The pilot episode introduces the employees of bar Cheers: Sam Malone, Diane Chambers, Coach Ernie Pantusso, and Carla Tortelli; and regular customers Norm Peterson and Cliff Clavin. In this episode, Diane, brought in by fiancé Sumner Sloan, meets the employees and patrons of the bar. When she realizes that her fiancé has left her alone in the bar, Diane accepts Sam's offer to be the bar's waitress to start over.
Document 3: John Ratzenberger: John Dezso Ratzenberger (born April 6, 1947) is an American actor, voice actor, and entrepreneur. He is best known as Cliff Clavin in "Cheers". He is also known for his extensive vocal work in Pixar Animation Studios' films, notably Hamm in the "Toy Story" franchise and Mack in the "Cars" franchise.
Document 4: Cliff Huxtable: Dr. Heathcliff "Cliff" Huxtable is a fictional character on the NBC sitcom, "The Cosby Show". He was portrayed by Bill Cosby.
Document 5: Diane Chambers: Diane Chambers is a fictional character in the American television situation comedy show "Cheers", portrayed by Shelley Long and created by Glen and Les Charles. After her fiancé Sumner Sloan abandons her in the Cheers bar in the pilot episode, Diane works as a bar waitress. She has an on-off relationship with the womanizing bartender Sam Malone (Ted Danson) and a one-year relationship with Frasier Crane (Kelsey Grammer), who later becomes a main character of the series and "Frasier". When Long left the series during the fifth season, the producers wrote her character out. Since then, they added her permanent replacement Rebecca Howe, a businesswoman played by Kirstie Alley, in the sixth season. Shelley Long made a special guest appearance in the series finale as Diane. Long also appeared in "Frasier" as Diane's fantasy counterpart in Frasier's dreams and the actual Diane in a crossover episode "The Show Where Diane Comes Back".
Document 6: The Golden Girls: The Golden Girls is an American sitcom created by Susan Harris that originally aired on NBC from September 14, 1985, to May 9, 1992, with a total of 180 half-hour episodes spanning over seven seasons. The show stars Beatrice Arthur, Betty White, Rue McClanahan, and Estelle Getty, as four older women who share a home in Miami, Florida. It was produced by Witt/Thomas/Harris Productions, in association with Touchstone Television, and Paul Junger Witt, Tony Thomas, and Harris served as the original executive producers.
Document 7: Sam Malone: Samuel "Sam" "Mayday" Malone is a fictional character on the American television show "Cheers", portrayed by Ted Danson and created by Glen and Les Charles. The central character of the series, Sam, a former relief pitcher for the Boston Red Sox baseball team, is the owner and bartender of the bar called "Cheers". He is also a recovering alcoholic and a notorious womanizer. Although his celebrity status was short-lived, Sam retains that standing within the confines of Cheers, where he is beloved by the regular patrons. Along with Carla Tortelli and Norm Peterson, he is one of only three characters to appear in all episodes of "Cheers". Sam has an on-again, off-again relationship with the bar waitress Diane Chambers (Shelley Long) for the series' first five seasons until her departure from the series. Then he tries to seduce Diane's replacement, Rebecca Howe (Kirstie Alley), who frequently rejects his advances. Sam also appears in "The Show Where Sam Shows Up", a crossover episode of the spin-off "Frasier".
Document 8: Frasier Crane: Frasier Winslow Crane is a fictional character on the American television sitcoms "Cheers" and "Frasier", portrayed by Kelsey Grammer. Grammer received award recognitions for portraying this character in these two shows, in addition to a 1992 one-time appearance in "Wings".
Document 9: Cheers: Cheers is an American sitcom that ran on NBC from September 30, 1982, to May 20, 1993, with a total of 275 half-hour episodes spanning over eleven seasons. The show was produced by Charles/Burrows/Charles Productions in association with Paramount Network Television. The show was created by the team of James Burrows, Glen Charles, and Les Charles. The show is set in a bar named Cheers in Boston, Massachusetts, where a group of locals meet to drink, relax, and socialize. The show's main theme song, written and performed by Gary Portnoy, lent its refrain "Where Everybody Knows Your Name" as the show's tagline.
Document 10: Cliff Clavin: Clifford C. "Cliff" Clavin, Jr. (born 1947 or 1949), is a fictional character on the American television show "Cheers" co-created (and played) by John Ratzenberger. A postal worker, he is the bar's know-it-all and was a contestant on the game show "Jeopardy!" Cliff was not originally scripted in the series' pilot episode, "Give Me a Ring Sometime", but the producers decided to add a know-it-all character and Ratzenberger helped flesh it out. The actor made guest appearances as Cliff on "St. Elsewhere", "Wings" and "Frasier".
Document 11: Sam and Diane: Sam Malone and Diane Chambers, collectively known as Sam and Diane, are fictional characters in the American situation comedy television series "Cheers". Sam Malone is a working-class, retired baseball player-turned-bartender played by Ted Danson; Diane Chambers is a college-graduate cocktail waitress played by Shelley Long. Danson appeared on "Cheers" for its entire run of the series; Long was part of the regular cast from the 1982 series premiere ("Give Me a Ring Sometime") until the fifth-season finale, "I Do, Adieu" (1987). Long returned for a special appearance in the 1993 series finale, "One for the Road."
Document 12: Cliff Barnes: Clifford "Cliff" Barnes, played by Ken Kercheval, is a fictional character from the popular American television series "Dallas". The Barnes family are competitors and sometimes enemies of the Ewing family. Cliff is the son of Willard "Digger" Barnes and Rebecca Barnes, the brother of Pamela Barnes Ewing and the half-brother of Katherine Wentworth. J.R. Ewing (played by Larry Hagman) was Cliff's personal nemesis, with Cliff and J.R. continuing on the bitter feud that started with their fathers, Digger Barnes and Jock Ewing, from their oil wildcatting days in the 1930s. Cliff and J.R. were the only two characters to appear throughout the entire run of the series. A running gag on the series is Cliff's fondness for Chinese take-out.
Document 13: Creed Bratton (character): Creed Rowland Bratton, also known as "William Charles Schneider" (claims to have been born November 1, 1925) is a fictional character from the U.S. television series "The Office". Confusion may arise from the fact that the character is played by the musician of the same name, Creed Bratton. The fictional Creed is partially based on the experiences and former flower child lifestyle of the real one; however, the character is an embellished version of the real person. Unlike most characters of this version of "The Office", he has no equivalent in the original BBC series despite sharing similar lines in the pilot episode with the character of Ryan Howard. Series writer B. J. Novak has said that the actual Creed Bratton is exactly like the character he plays, except that the real Creed is a good-hearted and likable person, while his fictional alter ego has a very dark side to him. His resourcefulness and duplicity are his defining traits along with his senile behavior and ignorance of the modern world.
Document 14: What Is... Cliff Clavin?: "What Is... Cliff Clavin?" is an eighth season episode of the American television series "Cheers". It was directed by Andy Ackerman rather than James Burrowswho directed 243 out of 273 episodes of the showand originally aired January 18, 1990 on NBC. In this episode, Cliff Clavin (John Ratzenberger) appears on the game show "Jeopardy!" and game show host Alex Trebek guest stars as himself. Cliff racks up US$ during the game but loses it all in the final round, and he unsuccessfully demands that his answer be accepted. Back at Cheers, Trebek encounters Cliff and announces his resignation from the game show, prompting Cliff to reconsider. Unbeknownst to Cliff, Trebek did that mainly to avoid him. Meanwhile, Sam retrieves his address book from a teenage boy Timmy, who repeatedly calls Sam's past dates, and ironically encourages Timmy to stick to girls around his age. The episode received praise from critics for its concept and its guest star.
Document 15: Ted Danson: Edward Bridge "Ted" Danson III (born December 29, 1947) is an American actor, author, and producer well known for his role as lead character Sam Malone on the NBC sitcom "Cheers" and for his role as Dr. John Becker on the CBS sitcom "Becker". He also starred in the CBS dramas "" and "" as D.B. Russell. He also plays a recurring role on Larry David's HBO sitcom "Curb Your Enthusiasm", starred alongside Glenn Close in legal drama "Damages", and was a regular on the HBO comedy series "Bored to Death". In 2015 he starred as Hank Larsson in the second season of FX's black comedy-crime drama anthology "Fargo". Since 2016, he has played the afterlife "architect" Michael in the NBC sitcom "The Good Place.
ground_truth: Charles/Burrows/Charles Productions