Teacher:In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Teacher: Now, understand the problem? Solve this instance: No year can be cited as the origin , because the style evolved over a long period .
Student:
No specific year can be cited as the origin of the blues , largely because the style evolved over a long period and existed in approaching its modern form before the term " blues " was introduced and before the style was thoroughly documented .