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.

He has been on the Chrysanthemum Throne since his father Akihito abdicated in 2019 .
He acceded to the Chrysanthemum Throne upon the abdication of his father , the now-Emperor Emeritus Akihito on 1 May 2019 at 00:00 local time ( 15:00 UTC ) .

David Sive ( September 22 , 1922 – March 12 , 2014 ) was an American lawyer , environmentalist , and professor of environmental law .
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 .

It is shared by Germany and Poland .

Szczecin Lagoon , Stettin Lagoon , Bay of Szczecin , or Stettin Bay , also Oder lagoon , is a lagoon in the Oder estuary , shared by Germany and Poland .