Question: Harold Whitaker animated "Animal Farm" in 1954 which is based on the book of the same name by which author?

Context paragraphs:
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.

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".

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.

Gordon Heath: Gordon Heath (September 20, 1918 – August 27, 1991) was an African-American actor and musician who narrated the animated feature film "Animal Farm" (1954) and appeared in the title role of "The Emperor Jones" (1953) and "Othello" (1955), both live BBC telecasts, respectively directed by Alvin Rakoff and Tony Richardson.

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.

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).

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".

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.

Benjamin (Animal Farm): Benjamin is a donkey in George Orwell's novel "Animal Farm".  He is also the oldest of all the animals (he is alive in the last scene of the novel).  He is less straightforward than most characters in the novel, and a number of interpretations have been put forward to which social class he represents as regards to the Russian Revolution and the Soviet Union.  (Animal Farm is an allegory for the evolution of Communism in Russia, with each animal representing a different social class, e.g. Boxer represents the working class)

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.

Supporting paragraphs: Harold Whitaker Animal Farm (1954 film)
Answer: George Orwell