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.

The atomic radius of an element is the distance between the nucleus and the edge of the electron cloud .
The atomic radius of a chemical element is a measure of the size of its atoms , usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons .

Wiktionary is run by the Wikimedia Foundation , which also runs Wikipedia .
Like its sister project Wikipedia , Wiktionary is run by the Wikimedia Foundation , and is written collaboratively by volunteers , dubbed " Wiktionarians " .

A Children 's Hearing is a legal hearing for children in Scotland .

A children 's hearing is part of the legal and welfare systems in Scotland ; it aims to combine justice and welfare for children and young people .

