Original sentence: Oliver Cromwell (April 25 1599 – September 3 1658) was an English military and political leader, best known for making England a republic and leading the Commonwealth of England, He and his son were thereby the only commoners ever to have been the English Head of State
Edited sentence: Oliver Cromwell (April 25 1599 – September 3 1658) was an English dictator, best known for making England a republic and leading the Commonwealth of England, He and his son were thereby the only commoners ever to have been the English Head of State