Complex sentence: She was born Phyllis Isobella Gross in Dulwich, London on 25 September, 1906, the daughter of Alexander Gross, a Hungarian Jewish immigrant and an Irish Italian Roman Catholic suffragette, whose parents disapproved of the match.
Split into simpler sentences: She was born Phyllis Isobella Gross in Dulwich, London on 25 September, 1906. Her father, Alexander Gross, was a Hungarian Jewish immigrant and her mother was an Irish Italian Roman Catholic suffragette, whose parents disapproved of the match.