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.

A federation is a union of a number of self-governing states or regions , which are joined together under a central government .
A federation ( also known as a federal state ) is a political entity characterized by a union of partially self-governing provinces , states , or other regions under a central federal government ( federalism ) .

A wind farm is a group of wind turbines in the same area .
A wind farm or wind park , also called a wind power station or wind power plant , is a group of wind turbines in the same location used to produce electricity .

John David Jackson ( January 19 , 1925 – May 20 , 2016 ) was a Canadian – American physics .

John David Jackson ( January 19 , 1925 – May 20 , 2016 ) was a Canadian – American physics professor emeritus at the University of California , Berkeley and a faculty senior scientist emeritus at Lawrence Berkeley National Laboratory .

