<Li> Pink Floyd's album Animals (1977) was partially inspired by Animal Farm . It categorises people as pigs, dogs, or sheep . </Li> <Li> R.E.M.'s song "Disturbance at the Heron House" is based on Animal Farm . </Li> <Li> Radiohead's song "Optimistic" contains a lyric mentioning Animal Farm . </Li> <Li> The Clash used an image from the animated movie Animal Farm (1954) on their single "English Civil War". </Li>

Who do the nine dogs represent in animal farm