Complex sentence: She then went to Louisville, Kentucky, where she was a member of the Actors Theatre of Louisville, where she originated the role of Lea in "My Sister in this House", a part that she played off-Broadway as well.
Split into simpler sentences: She then went to Louisville, Kentucky, where she was a member of the Actors Theatre of Louisville. While there she originated the role of Lea in "My Sister in this House", a part that she played off-Broadway as well.