Complex sentence: He was married again in 1894, to Ethel Constance Clark of Winnipeg, and they had two sons and two daughters, one of whom, Marguerite, married Malcolm Trustram Eve, 1st Baron Silsoe.
Split into simpler sentences: He was married again in 1894, to Ethel Constance Clark of Winnipeg, and they had two sons and two daughters. Another daughter, Marguerite, married Malcolm Trustram Eve, 1st Baron Silsoe.