Complex sentence: She received a bachelor's degree in psychology from Wesleyan University in 1981, and then moved to San Francisco, California, where she spent a few years as a freelance copy editor, then as a columnist.
Split into simpler sentences: She received a bachelor's degree in psychology from Wesleyan University in 1981. She then moved to San Francisco, California, and spent a few years working as a freelance copy editor, then as a columnist.