Complex sentence: Glycerius Prosopography of the Later Roman Empire II.514 (c.420--after 480) was one of the last Western Roman Emperors (reigned 473--74) and later served as a bishop in the early Catholic Church.
Split into simpler sentences: Glycerius Prosopography of the Later Roman Empire II.514 (c.420--after 480) was Western Roman Emperor from 473 to 474. He later served as a bishop in the early Catholic Church.