Complex sentence: Dressler left the Starr company to return home to her parents in Saginaw, but when the Bennett and Moulton Opera Company came to town, Dressler was, according to Dressler, chosen from the church choir by the company's manager and asked to join the company.
Split into simpler sentences: Dressler left the Starr company to return home to her parents in Saginaw. According to Dressler, when the Bennett and Moulton Opera Company came to town, she was chosen from the church choir by the company's manager and asked to join the company.