Complex sentence: Anna was active as a writer and journalist, and she served as editor of the woman's page of the Seattle Post-Intelligencer for several later life to problems of education and to carrying on many of her mother's interests and philanthropies.
Split into simpler sentences: Anna was active as a writer and journalist, and she served as editor of the woman's page of the Seattle Post-Intelligencer for several years. Anna devoted much of her later life to problems of education and to carrying on many of her mother's interests and philanthropies.