 Just as mondegreens transform songs based on experience, a folk song learned by repetition often is transformed over time when sung by people in a region where some of the song's references have become obscure.A classic example is "The Golden Vanity", which contains the line "As she sailed upon the lowland sea".British immigrants carried the song to Appalachia, where singers, not knowing what the term "lowland sea" refers to, transformed it over generations from "lowland" to "lonesome".