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.

Ex Input:
Space Shuttle " Endeavour " ( Orbiter Vehicle Designation : OV-105 ) is a retired orbiter from NASA 's Space Shuttle program and the fifth and final operational Shuttle built .

Ex Output:
Space Shuttle Endeavour ( OV-105 ) is the fifth space shuttle run by NASA .


Ex Input:
It was common for the Ernestine duchies to merge and split ; Ernest 's combined duchy was divided again after his death in 1675 , and the Duchy of Saxe-Gotha-Altenburg proper came into existence in 1680 with the completion of this division and the accession of his eldest son , Frederick to the subdivision centered on the towns of Gotha and Altenburg .

Ex Output:
The duchy was split up again after Ernest ’ s death in 1675 , and the Duchy of Saxe-Gotha-Altenburg officially came into existence in 1680 when his eldest son , Frederick , took control of the parts of the country Gotha and Altenburg .


Ex Input:
In computing , a digital object identifier ( DOI ) is a persistent identifier or handle used to identify objects uniquely , standardized by the International Organization for Standardization ( ISO ) .

Ex Output:

A Digital Object Identifier ( or DOI ) is a permanent way to identify an online document .