Complex sentence: Meanwhile, Nettie has been living with missionaries in Africa and writing frequently to Celie-however, Celie is unaware of the correspondence, as Albert has confiscated the letters, telling Celie that she will never hear from her sister again.
Split into simpler sentences: Meanwhile, Nettie has been living with missionaries in Africa and writing frequently to Celie. Celie, however, is unaware of the correspondence as Albert confiscates the letters, telling Celie that she will never hear from her sister again.