Complex sentence: On August 4,1983, President Ronald Reagan nominated Spiers to became the Undersecretary of State for Management; he served in this position until 1989, when President George H. W. Bush nominated him for Undersecretary General of the United Nations for Political Affairs.
Split into simpler sentences: On August 4,1983, President Ronald Reagan nominated Spiers to became the Undersecretary of State for Management. He served in this position until 1989, when President George H. W. Bush nominated him for Undersecretary General of the United Nations for Political Affairs.