The North Wind and the Sun, a classic example of Aesop's Fables, has a linguistic purpose. Much like 'The quick brown fox jumped over the lazy dog' is used to exemplify different fonts, this passage is used to exemplify languages by linguists. Usually, the story will be written in the language of the speaker, then narrowly and then broadly transcribed into IPA or another phonetic alphabet. This gives linguists a good cross-section of the language so that they can observe and construct a phonology of the language, as well as describe which phones occur as allophones. It can also be used to compare and contrast regional dialects.