Complex sentence: After graduating from high school, Kavner attended San Diego State University and majored in drama, being cast in several productions including a role as Charlotte Corday in "Marat/Sade", becoming known for her improvisation and ability to do both comedy and drama.
Split into simpler sentences: After graduating from high school, Kavner attended San Diego State University and majored in Drama. She became known for her improvisation and ability to do both comedy and drama.