Complex sentence: She studied at Smith College, where she received a Bachelor of Arts, and she went on to attend Columbia University, where she received a Master of Arts degree in sociology, and the Australian National University, where she received a PhD.
Split into simpler sentences: She studied at Smith College, where she received a Bachelor of Arts,. She went on to attend Columbia University, where she received a Master of Arts degree in sociology, and the Australian National University, where she received a PhD.