Complex sentence: He was married to the former Margaret Livingston Chanler in 1906; the couple had two children: a daughter, Margaret Aldrich DeMott (died April 24,2011, aged 100), and a son, the late Richard Chanler Aldrich.
Split into simpler sentences: He was married to the former Margaret Livingston Chanler in 1906. They had two children: a daughter, Margaret Aldrich DeMott (died April 24,2011, aged 100), and a son, the late Richard Chanler Aldrich.