Complex sentence: In 1896, Mahoney was one of the original members of a predominantly white Nurses Associated Alumnae of the United States and Canada, which in 1911 became the American Nurses Association (ANA).
Split into simpler sentences: In 1896, Mahoney was one of the original members of a predominantly white Nurses Associated Alumnae of the United States and Canada. In 1911 it became the American Nurses Association (ANA).