Complex sentence: During the period 1989-1994, she was an award-winning aerospace reporter for Copley Los Angeles Newspapers, and, subsequently, from 1995 to 2000, she was chief US stocks editor at Bloomberg News.
Split into simpler sentences: During the period 1989-1994, she was an award-winning aerospace reporter for Copley Los Angeles Newspapers. Subsequently, from 1995 to 2000, she was chief US stocks editor at Bloomberg News.