Complex sentence: De Vasconcellos' father was a wealthy Brazilian diplomat and an English Quaker mother, who helped ensure Josefina was able to develop her artistic talents through a childhood shared between England and Brazil.
Split into simpler sentences: De Vasconcellos' father was a wealthy Brazilian diplomat. Her mother was an English Quaker who helped ensure Josefina was able to develop her artistic talents through a childhood shared between England and Brazil.