Complex sentence: She married Arthur Bonner in 1885 in Marylebone, London and they had two children, Kenneth Bradlaugh Bonner (June--September 1886) and Charles Bradlaugh Bonner (28 April 1890--2 September 1966).
Split into simpler sentences: She married Arthur Bonner in 1885 in Marylebone, London. They had two children, Kenneth (June--September 1886) and Charles Bradlaugh Bonner (28 April 1890--2 September 1966).