Question: What comic strip, created by Robert Crumb, did Manuel "Manny" Perez work on later in his career?

full_context: Document 1: Fritz the Cat (film): Fritz the Cat is a 1972 American adult animated comedy film written and directed by Ralph Bakshi. It was Bakshi's feature film debut and is loosely based on the Fritz the Cat comic strips by Robert Crumb. It was the first animated feature film to receive an X rating in the United States.
Document 2: Robert Sikoryak: Robert Sikoryak (born 1964) is an American artist whose work is usually signed R. Sikoryak. He specializes in making comic adaptations of literature classics. Under the series title "Masterpiece Comics", these include "Crime and Punishment" rendered in Bob Kane–era Batman style, becoming "Dostoyevsky Comics", starring Raskol; and "Waiting for Godot" mixed with "Beavis and Butt-Head", becoming "Waiting to Go".
Document 3: Friz Freleng: Isadore "Friz" Freleng (August 21, 1906 – May 26, 1995), often credited as I. Freleng, was an American animator, cartoonist, director, producer, and composer known for his work on the Warner Bros. "Looney Tunes" and "Merrie Melodies" series of cartoons.
Document 4: History of British animation: The history of animation in the United Kingdom began at the very origins of the artform in the late 19th century. British animation has been strengthened by an influx of émigrés to the UK, renowned animators such as Lotte Reiniger (Germany), John Halas (Hungary), George Dunning and Richard Williams (Canada), Terry Gilliam and Tim Burton (USA) have all worked in the UK at various stages of their careers. Notable full-length animated features to be produced in the UK include Animal Farm (1954), Yellow Submarine (1968), Watership Down (1978), and (2005).
Document 5: Richard Thompson (animator): Richard "Dick" Thompson (26 August 1914 – 12 June 1998) was an American animator who worked at several animated cartoon departments over a career of four decades. His longest association was with Chuck Jones at Warner Bros. Cartoons and MGM Animation/Visual Arts. He also worked at Hanna-Barbera and DePatie-Freleng Enterprises. Notably, Thompson worked as an animator on Chuck Jones' Road Runner cartoons: "In one of the most often cited discussions of the Road Runner cartoons, Richard Thompson suggests a way to think about this unusual characteristic when he describes how "Road Runner films rank among the most austerely pared-down works of modern art. His work on Tom and Jerry is really good too.
Document 6: Bugs Bunny: Bugs Bunny is an animated cartoon character; created in 1940 by Leon Schlesinger Productions (later Warner Bros. Cartoons) and voiced originally by Mel Blanc. Bugs is best known for his starring roles in the "Looney Tunes" and "Merrie Melodies" series of animated short films, produced by Warner Bros. During the golden age of American animation, his popularity increased. This era led to his becoming an American cultural icon and the official mascot of Warner Bros. Entertainment.
Document 7: Heavy Traffic: Heavy Traffic is a 1973 American adult animated comedy-drama film written and directed by Ralph Bakshi. The film, which begins, ends, and occasionally combines with live-action, explores the often surreal fantasies of a young New York cartoonist named Michael Corleone, using pinball imagery as a metaphor for inner-city life. "Heavy Traffic" was Bakshi and producer Steve Krantz's follow-up to the film "Fritz the Cat". Though producer Krantz made varied attempts to produce an R-rated film, "Heavy Traffic" was given an X rating by the MPAA. The film received positive reviews and is widely considered to be Bakshi's biggest critical success.
Document 8: Cartoonist: A cartoonist (also comic strip creator) is a visual artist who specializes in drawing cartoons. This work is often created for entertainment, political commentary, or advertising. Cartoonists may work in many formats, such as animation, booklets, comic strips, comic books, editorial cartoons, graphic novels, manuals, gag cartoons, graphic design, illustrations, storyboards, posters, shirts, books, advertisements, greeting cards, magazines, newspapers, and video game packaging.
Document 9: Bill Melendez: José Cuauhtémoc Meléndez (November 15, 1916 – September 2, 2008), known as Bill Melendez, was a Mexican American character animator, film director, voice artist and producer, known for his cartoons for Walt Disney Productions (working on four Disney films "Pinocchio", "Fantasia", "Dumbo" and "Bambi"), Warner Bros. Cartoons, UPA and the "Peanuts" series. Melendez provided the voices of Snoopy and Woodstock in the latter as well.
Document 10: Ren and Stimpy (characters): Ren and Stimpy, created by John Kricfalusi, are the title characters in the American-Canadian animated television series "The Ren & Stimpy Show". Kricfalusi created the characters during his stay in Sheridan College and they first appeared on film in the pilot episode "Big House Blues". Ren is a scrawny, violently psychotic Chihuahua, and Stimpy is a fat, stupid cat. They are often at odds with each other on the show, though they do share moments of closeness together.
Document 11: Tex Avery: Frederick Bean "Tex" Avery (February 26, 1908 – August 26, 1980) was an American animator and animation director, known for producing animated cartoons during the golden age of American animation. His most significant work was for the Warner Bros. and Metro-Goldwyn-Mayer studios, crucial in the evolution of Bugs Bunny, creating Daffy Duck, Droopy, and Screwy Squirrel, and developing Porky Pig and Chilly Willy (this last one for the Walter Lantz Studio) into the personas for which they are remembered.
Document 12: Fritz the Cat: Fritz the Cat is a comic strip created by Robert Crumb. Set in a "supercity" of anthropomorphic animals, the strip focuses on Fritz, a feline con artist who frequently goes on wild adventures that sometimes involve sexual escapades. Crumb began drawing this character in homemade comic books when he was a child. Fritz became one of his most famous characters, thanks largely to the motion picture adaptation by Ralph Bakshi.
Document 13: Manuel Perez (animator): Manuel 'Manny' Perez (17 June 1914 – 18 January 1981) was a Mexican American animator and animation director whose career spanned 40 years, from the 1940s to the 1980s, and best known for his work on the Warner Bros. animated shorts, working on such cartoons as Bugs Bunny and Daffy Duck. Later in his career he worked on Fritz the Cat and "The Lord of the Rings".
Document 14: Warner Bros. Animation: Warner Bros. Animation (currently known alternatively as Warner Animation Group for theatrically released films) is the animation division of Warner Bros. The studio is closely associated with the "Looney Tunes" and "Merrie Melodies" characters, among others. The studio is the successor to Warner Bros. Cartoons (formerly Leon Schlesinger Productions), the studio which produced "Looney Tunes" and "Merrie Melodies" cartoon shorts from 1933 to 1963, and from 1967 to 1969. Warner reestablished its animation division in 1980 to produce "Looney Tunes"–related works.
Document 15: Sesame Street (comic strip): Sesame Street is a nationally syndicated comic strip inspired by "Sesame Street". Written and drawn by veteran Sesame animator Cliff Roberts, the earliest concept art was created in 1970, and by 1971, a promotional booklet was created as the comic entered the market, courtesy of King Features. The strip debuted on November 15, 1971, in more than 175 newspapers, and ran until 1975. The strip, which ran both daily and on Sundays, was conceptually similar to the series in its pedagogical goals, but, in the first two years of the strip, conspicuous by the absence of the Muppets.
ground_truth: Fritz the Cat