Question: Ken Southworth (September 22, 1918 – December 6, 2007) was a veteran English cartoon animator and instructor who worked for a number of major animation studios throughout his career, his credits included The Adventures of Ichabod and Mr. Toad is a 1949 animated package film produced by Walt Disney Productions and released by who?
Context: The Three Caballeros is a 1944 American live-action animated musical package film produced by Walt Disney and released by RKO Radio Pictures.  The film premiered in Mexico City on December 21, 1944.  It was released in the United States on February 3, 1945 and in the UK that March.  The seventh Disney animated feature film, the film plots an adventure through parts of Latin America, combining live-action and animation.  This is the second of the six package films released by Walt Disney Productions in the 1940s, following "Saludos Amigos" (1942). This is a list of animated short films produced by Walt Disney and Walt Disney Animation Studios from 1921 to the present.  This includes films produced at the Laugh-O-Gram Studio which Disney founded in 1921 as well as the animation studio now owned by The Walt Disney Company, previously called the Disney Brothers Cartoon Studio (1923), The Walt Disney Studio (1926), Walt Disney Productions (1929), and Walt Disney Feature Animation (1986). The Adventures of Ichabod and Mr. Toad is a 1949 animated package film produced by Walt Disney Productions and released by RKO Radio Pictures.  The film consists of two segments – the first is based on the 1908 children's novel "The Wind in the Willows" by Scottish author Kenneth Grahame, and the second is based on the 1820 short story "The Legend of Sleepy Hollow," called "Ichabod Crane" in the film, by American author Washington Irving. Hercules: Zero to Hero is a 1999 comedy-drama adventure and fantasy animated television film produced by Walt Disney Television Animation, Walt Disney Animation Australia, Walt Disney Animation Japan and Toon City Animation, Inc., Manila, Philippines.  The film is a direct-to-video followup to 1997 animated feature "Hercules".  It was released on August 17, 1999.  The film serves as a package film combing three episodes of "Hercules: The Animated Series" as flashback segments. Mr. Toad's Wild Ride is a dark ride at Disneyland Park, also formerly located at the Magic Kingdom.  Originally planned to be a roller coaster, it became a dark ride attraction because Walt Disney only wanted attractions that were appropriate for all ages.  It is one of the few remaining attractions that was operational on the park's opening day in 1955 (although the current version of the ride opened in 1983).  The ride's story is based on Disney's adaptation of "The Wind in the Willows" (1908), one of the two segments of the film "The Adventures of Ichabod and Mr. Toad" (1949).  It is currently operating in Fantasyland. Kenneth Grahame ( ; 8 March 1859 – 6 July 1932) was a Scottish writer, most famous for "The Wind in the Willows" (1908), one of the classics of children's literature.  He also wrote "The Reluctant Dragon"; both books were later adapted for stage and film, of which A.A. Milne's "Toad of Toad Hall" was the first, and the Disney films, which are "The Adventures of Ichabod and Mr. Toad" and "The Reluctant Dragon" are best known. Mickey's House of Villains (also known as House of Mouse: The Villains) is a 2002 direct-to-video animated film produced by The Walt Disney Company (Walt Disney Television Animation and Toon City Animation, with animation coordination by Walt Disney Feature Animation Florida.  It is based on the Disney Channel animated television series "Disney's House of Mouse" and a sequel to the direct-to-video animated film "", starring Mickey Mouse, Donald Duck, Minnie Mouse, Goofy, Daisy Duck and Disney Villains that have appeared in past Disney productions.  It was released on both VHS and DVD by Walt Disney Home Video on September 3, 2002.  It was followed by a 2004 direct-to-video animated film, "", produced by DisneyToon Studios, on August 17, 2004. Mickey's Christmas Carol is a 1983 American animated featurette produced by Walt Disney Productions and released by Buena Vista Distribution.  It was directed and produced by Burny Mattinson.  The cartoon is an adaptation of Charles Dickens' "A Christmas Carol", starring Scrooge McDuck as Ebenezer Scrooge.  Many other Disney characters, primarily from the Mickey Mouse universe, "Robin Hood", and "The Adventures of Ichabod and Mr. Toad", were cast throughout the film. Saludos Amigos (Spanish for "Greetings, Friends") is a 1942 American live-action animated package film produced by Walt Disney and released by RKO Radio Pictures.  It is the sixth Disney animated feature film and the first of the six package films produced by Walt Disney Productions in the 1940s.  Set in Latin America, it is made up of four different segments; Donald Duck stars in two of them and Goofy stars in one.  It also features the first appearance of José Carioca, the Brazilian cigar-smoking parrot.  "Saludos Amigos" was popular enough that Walt Disney decided to make another film about Latin America, "The Three Caballeros", to be produced two years later.  "Saludos Amigos" premiered in Rio de Janeiro on August 24, 1942.  It was released in the United States on February 6, 1943.  At 42 minutes, it is Disney's shortest animated feature to date.  It garnered positive reviews and was theatrically reissued in 1949, when it was shown on a double bill with the first reissue of "Dumbo". Ken Southworth (September 22, 1918 – December 6, 2007) was a veteran English cartoon animator and instructor who worked for a number of major animation studios throughout his career, including Walt Disney Studios, Hanna-Barbera, Filmation, Warner Bros., MGM, Walter Lantz and Clokey Productions.  His credits included Disney's "Alice in Wonderland" and "Legend of Sleepy Hollow" as well as Hanna-Barbera's "The Flintstones", "The Smurfs" and "Space Ghost".
Answer: RKO Radio Pictures