Question: Squealer is a fictional character, a pig, in which author's book, "Animal Farm", in the book, he is described as merely a fat pig, but in the 1954 film, he is a pink pig, whereas in the 1999 film, Animal Farm, he is a Tamworth pig who wears a monocle? 

full_context: Document 1: Anthems in Animal Farm: George Orwell's allegorical novel "Animal Farm" contains various anthems adopted by the eponymous farm, most notably the original anthem "Beasts of England" and its later replacement "Comrade Napoleon".
Document 2: Animal Farm: Animal Farm is an allegorical novella by George Orwell, first published in England on 17 August 1945. According to Orwell, the book reflects events leading up to the Russian Revolution of 1917 and then on into the Stalinist era of the Soviet Union. Orwell, a democratic socialist, was a critic of Joseph Stalin and hostile to Moscow-directed Stalinism, an attitude that was critically shaped by his experiences during the Spanish Civil War. The Soviet Union, he believed, had become a brutal dictatorship, built upon a cult of personality and enforced by a reign of terror. In a letter to Yvonne Davet, Orwell described "Animal Farm" as a satirical tale against Stalin (""un conte satirique contre Staline""), and in his essay "Why I Write" (1946), wrote that "Animal Farm" was the first book in which he tried, with full consciousness of what he was doing, "to fuse political purpose and artistic purpose into one whole".
Document 3: Babe (film): Babe is a 1995 Australian-American comedy-drama film directed by Chris Noonan, produced by George Miller, and written by both. It is an adaptation of Dick King-Smith's 1983 novel "The Sheep-Pig", also known as "Babe: The Gallant Pig" in the US, which tells the story of a pig who wants to be a sheepdog. The main animal characters are played by a combination of real and animatronic pigs and Border Collies.
Document 4: Nineteen Eighty-Four (1984 film): Nineteen Eighty-Four, also known as 1984, is a 1984 British dystopian drama film written for the screen and directed by Michael Radford, based upon George Orwell's novel of the same name. Starring John Hurt, Richard Burton, Suzanna Hamilton, and Cyril Cusack, the film follows the life of Winston Smith in Oceania, a country run by a totalitarian socialist government.
Document 5: The Cow (1989 film): The Cow (Russian: Корова Korova) is a 1989 Soviet animated short film directed by Aleksandr Petrov. It tells the story of a boy who recalls how his family lost its cow. The film is based on a short story by Andrei Platonov and was made using paint-on-glass animation.
Document 6: Snowball (Animal Farm): Snowball is a character in George Orwell's "Animal Farm". He is largely based on Leon Trotsky and describes how he led the opposition against Joseph Stalin (Napoleon), though he also includes elements of Vladimir Lenin. He is shown as a pink pig on the movie poster for the 1999 film "Animal Farm", being voiced by Kelsey Grammer.
Document 7: Hexie Farm: Hexie Farm (), by an author known as Crazy Crab, is an online political cartoon in China critical of the Chinese government. "Hexie" in Chinese Pinyin is a pun on harmony and river crab. The cartoon started running in August 2010, focusing on animal characters living in a "Harmonic Farm". It is loosely based on George Orwell’s novel "Animal Farm".
Document 8: Squealer (Animal Farm): Squealer is a fictional character, a pig, in George Orwell's "Animal Farm". He plays the secondary antagonist to Napoleon, the pigs' leader. He serves as Napoleon's second-in-command and the farm's minister of propaganda, and is described in the book to be an effective and very convincing orator. In the book, he is described as merely a fat pig, but in the 1954 film, he is a pink pig, whereas in the 1999 film, he is a Tamworth pig who wears a monocle.
Document 9: Animal Farm (1954 film): Animal Farm is a 1954 British-American adult animated comedy-drama film by Halas and Batchelor, based on the book "Animal Farm" by George Orwell. It was the first British animated feature to be released ("Water for Firefighting" and "Handling Ships", two feature length wartime training films, were produced earlier, but did not receive a formal cinema release). The US CIA paid for the filming, part of the American cultural offensive during the Cold War, and influenced how Orwell's ideas were to be presented. The CIA initially funded Louis de Rochemont to begin work on a film version of Orwell's work and he hired Halas & Batchelor, an animation firm in London that had made propaganda films for the British government.
Document 10: Barnhill, Jura: Barnhill is a farmhouse situated at grid reference [ NR705970] in the north of the island of Jura in the Scottish Hebrides. It stands on the site of a larger 15th Century settlement called Cnoc an t-Sabhail; the English name Barnhill having been in use since the early twentieth century. The house was the home of the English essayist and novelist George Orwell, who lived there intermittently from 1946 until his death in 1950, and who completed his novel "Nineteen Eighty-Four" while living there. Barnhill is a site of interest for many who are familiar with the life and writing of George Orwell.
Document 11: Animal Farm (1999 film): Animal Farm is a made-for-TV film released in 1999 by Hallmark Films and broadcast on the American cable channel TNT. It is an adaptation of the 1945 George Orwell novel of the same name. The film tells the story of farm animals successfully revolting against their human owner, only to slide into a more brutal tyranny among themselves. The film received mixed reviews when it was broadcast, with much criticism directed at its ending.
Document 12: Snowball's Chance: Snowball's Chance, is a parody of George Orwell's "Animal Farm" written by John Reed, in which Snowball the pig returns to the Manor Farm after many years' absence, to install capitalism — which proves to have its own pitfalls.
Document 13: Napoleon (Animal Farm): Our Leader, Comrade Napoleon, Father of All Animals, Terror of Mankind, Protector of the Sheep-fold, Ducklings' Friend is a fictional character and the main antagonist in George Orwell's "Animal Farm". He is described as "a large, rather fierce-looking Berkshire boar" who is "not much of a talker" and has "a reputation for getting his own way". While he is at first a common farm pig, he exiles Snowball, another pig, who is his rival for power, and then takes advantage of the animals' uprising against their masters to eventually become the tyrannical "President" of Animal Farm, which he turns into a dictatorship. Napoleon's greatest crime, however, is his complete transformation into Mr. Jones (original owner of Animal Farm), although Napoleon is a much more harsh and stern master than Mr. Jones is made out to be.
Document 14: Harold Whitaker: Harold Jackson Whitaker (5 June 1920 – 26 December 2013) was a British animator, whose credits included "Animal Farm" in 1954 and "Heavy Metal" in 1981. He first worked for Anson Dyer, before spending thirty years as an animator for Halas and Batchelor. He made a comic strip adaptation of "Animal Farm" in 1954.
Document 15: The Farm (Bromfield novel): The Farm is a 1933 novel by Louis Bromfield. Written just before Bromfield's return from decades of living and writing in Europe, the novel reflects the agrarian interests that would dominate the author's thinking during the last two decades of his life. David Anderson describes it as Bromfield's best work but one, like many after the author's early successes, too little appreciated. "The unfair criticisms of the early 1930s have discouraged later critics from looking at his work clearly and coherently," he argues.
ground_truth: George Orwell