Question: What animator worked on the 25th Disney animated feature film, as well as "Beauty and The Beast" and many others?

full_context: Document 1: Glen Keane: Glen Keane (born April 13, 1954) is an American animator, author and illustrator. Keane is best known for his character animation at Walt Disney Animation Studios for feature films including "The Little Mermaid", "Beauty and the Beast", "Aladdin", "Pocahontas", "Tarzan" and "Tangled". Keane received the 1992 Annie Award for character animation, the 2007 Winsor McCay Award for lifetime contribution to the field of animation and in 2013 was named a Disney Legend.
Document 2: The Book of Three: The Book of Three (1964) is a high fantasy novel by Lloyd Alexander, the first of five volumes in "The Chronicles of Prydain". The series follows the adventures of Taran the Assistant Pig-Keeper, a youth raised by Dallben the enchanter, as he nears manhood while helping to resist the forces of Arawn Death-Lord.
Document 3: The Black Cauldron (novel): The Black Cauldron (1965) is a high fantasy novel by Lloyd Alexander, the second of five volumes in "The Chronicles of Prydain". For 1966 it was a Newbery Honor book, runner-up for the year's "most distinguished contribution to American literature for children".
Document 4: Princess Eilonwy: Princess Eilonwy, later known as Queen Eilonwy ( ), is a fictional character in Lloyd Alexander's "The Chronicles of Prydain". She appears in four of the five novels in the series, as well as Disney's 1985 animated film adaptation "The Black Cauldron". Eilonwy is a member of the Royal House of Llyr, and the women in her line are formidable enchantresses, including her mother Angharad and grandmother Regat. She has inherited this characteristic, most readily visible in her manipulation of a magical item she calls her "bauble", a small golden sphere that glows with magical light when activated by her willpower. Eilonwy's father, Geraint, was a commoner with whom her mother fell in love.
Document 5: The Black Cauldron (film): The Black Cauldron is a 1985 American animated dark fantasy adventure film produced by Walt Disney Feature Animation in association with Silver Screen Partners II and released by Walt Disney Pictures. The 25th Disney animated feature film, it is loosely based on the first two books in "The Chronicles of Prydain" by Lloyd Alexander, a series of five novels that are, in turn, based on Welsh mythology.
Document 6: Anthony DeRosa: Anthony "Tony" DeRosa is an american character animator, best known for his work at Walt Disney Animation Studios. DeRosa has worked as a lead animator on several Disney animated features, including "The Lion King", "Pocahontas", "Hercules", "Fantasia 2000", "" and "The Princess and the Frog". Outside of Disney, DeRosa has worked as an animator on films such as "", "Fat Albert", "Curious George" and "The Simpsons Movie", for which he received an Annie Award nomination.
Document 7: H. Lee Peterson: H. Lee Peterson is a veteran animation editor. His credits for Walt Disney Pictures include being an assistant editor for "The Little Mermaid", and the lead film editor for "Aladdin", "Pocahontas", "Dinosaur", "Home on the Range" and the short film "The Prince and the Pauper; starring Mickey Mouse".
Document 8: Disney Renaissance: In the history of The Walt Disney Company, the Disney Renaissance refers to the era from 1989 to 1999 during which Walt Disney Feature Animation (renamed Walt Disney Animation Studios in 2006) experienced a creative resurgence in producing successful animated films based on well-known stories, which restored public and critical interest in The Walt Disney Company as a whole. During this era, the studio produced and released ten animated films: "The Little Mermaid" (1989), "The Rescuers Down Under" (1990), "Beauty and the Beast" (1991), "Aladdin" (1992), "The Lion King" (1994), "Pocahontas" (1995), "The Hunchback of Notre Dame" (1996), "Hercules" (1997), "Mulan" (1998) and "Tarzan" (1999).
Document 9: David Metzger: David Metzger (born in 1960 in Corvallis, Oregon), is an American orchestrator and composer best known for his orchestrations of many Disney feature animation films of the past 20 years. He has helped to shape the classic Disney orchestral sound on major Disney films including "Frozen", "Moana", "Planes", "Wreck-It Ralph", "Tarzan", "Haunted Mansion", and "Brother Bear". He arranged 6 of the 7 songs in "Frozen" including the blockbuster "Let It Go" as well as much of the score. In addition to his work for Disney, he has done orchestrations for over 50 major films. He has also composed the musical score for Tarzan 2, Brother Bear 2, and Tarzan and Jane. He also has numerous video game, theme park, TV, and commercial credits.
Document 10: Lloyd Alexander: Lloyd Chudley Alexander (January 30, 1924 – May 17, 2007) was an American author of more than forty books, primarily fantasy novels for children and young adults. His most famous work is "The Chronicles of Prydain", a series of five high fantasy novels whose conclusion, "The High King", was awarded the 1969 Newbery Medal for excellence in American children's literature. He won U.S. National Book Awards in 1971 and 1982.
Document 11: The Castle of Llyr: The Castle of Llyr (1966) is a high fantasy novel by Lloyd Alexander, the third of five volumes in "The Chronicles of Prydain". The story continues the adventures of Taran "Assistant Pig-Keeper", primarily on the Isle of Mona west of Prydain, far from the forces of Arawn, Lord of Death.
Document 12: The Chronicles of Prydain: The Chronicles of Prydain is a pentalogy of children's high fantasy Bildungsroman novels written by American author Lloyd Alexander. Henry Holt published one annually from 1964 to 1968; the second earned a 1966 Newbery Honor and the last won the 1969 Newbery Medal.
Document 13: The Great Mouse Detective: The Great Mouse Detective is a 1986 American animated mystery comedy film produced by Walt Disney Feature Animation and released by Walt Disney Pictures. The 26th Disney animated feature film, the film was directed by Burny Mattinson, David Michener, and the team of John Musker and Ron Clements, who later directed Disney's hit films "The Little Mermaid" and "Aladdin". The film was also known as The Adventures of the Great Mouse Detective for its 1992 theatrical re-release and Basil the Great Mouse Detective in some countries. The main characters are all mice and rats living in Victorian London.
Document 14: David Pruiksma: David Pruiksma (born January 15, 1957) is an American animator, best known for his work for The Walt Disney Company. He has worked on "The Black Cauldron", "The Great Mouse Detective", "Oliver & Company", "The Little Mermaid", "The Rescuers Down Under", "Beauty and the Beast", "Aladdin", "The Lion King", "Pocahontas", "The Hunchback of Notre Dame", and "".
Document 15: Gwystyl: Gwystyl is a character in Lloyd Alexander's fantasy "Chronicles of Prydain" book series. He first appears as one of the Fair Folk in the second novel of the series, "The Black Cauldron". He also makes an appearance in the fifth and final novel, "The High King."
ground_truth: David Pruiksma