Given the task definition and input, reply with output. In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

David Sive ( September 22 , 1922 March 12 , 2014 ) was an attorney , environmentalist , and professor of environmental law , who has been recognized as a pioneer in the field of United States environmental law .
David Sive ( September 22 , 1922 March 12 , 2014 ) was an American lawyer , environmentalist , and professor of environmental law .