Complex sentence: He was married to Edith Bethune-Baker, nee Furneaux Jordan, a welfare campaigner, born 1862; their son Arthur Bethune-Baker was a contemporary of Charles Hamilton Sorley at Marlborough College, but he died while still at school, aged sixteen.
Split into simpler sentences: He was married to Edith Bethune-Baker, Furneaux Jordan, a welfare campaigner, born 1862. Their son Arthur Bethune-Baker was a contemporary of Charles Hamilton Sorley at Marlborough College, but he died while still at school, aged sixteen.