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.

Ex Input:
The kilogram is the base unit of mass in the International System of Units ( SI ) .

Ex Output:
The kilogram ( also kilogramme ) is the base unit of mass in the metric system , formally the International System of Units ( SI ) , having the unit symbol kg .

Ex Input:
A crystal is a solid whose molecules ( or atoms ) are arranged in a repeating pattern .

Ex Output:
A crystal or crystalline solid is a solid material whose constituents ( such as atoms , molecules , or ions ) are arranged in a highly ordered microscopic structure , forming a crystal lattice that extends in all directions .

Ex Input:
The Western Dakota are also called the Yankton or Yanktonai , and are located in the Missouri River area .

Ex Output:
The Western Dakota are the Yankton , and the Yanktonai ( " Iha kth uwa " and " Iha kth uwana " ; " Village-at-the-end " and " Little village-at-the-end " ) , who reside in the Upper Missouri River area .