Complex sentence: She attended and graduated from Columbia University with a degree in American history; in college, she auditioned for acting with teacher Uta Hagen and decided to become an actress, after taking Hagen's class.
Split into simpler sentences: She attended and graduated from Columbia University with a degree in American history. In college, she auditioned for acting with teacher Uta Hagen and decided to become an actress after taking Hagen's class.