Complex sentence: His mother, Alice Tucker (née Atkinson), was an American Mayflower descendant and worked as a landscape painter, and his father, George Chychele Waterston, was an immigrant from Leith, Scotland and a semanticist and language teacher.
Split into simpler sentences: His mother, Alice Tucker (née Atkinson), was an American Mayflower descendant and worked as a landscape painter. His father, George Chychele Waterston, was an immigrant from Leith, Scotland and a semanticist and language teacher.