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: Modern art refers to artistic works produced from the 1860s to about the 1970s .
Student:
Modern art includes artistic work produced during the period extending roughly from the 1860s to the 1970s , and denotes the styles and philosophy of the art produced during that era .