Complex sentence: His mother, Irene Gedevanishvili (1938-2011), is the daughter of Artchil Gedevanishvili (1897-1970), a Georgian aristocrat, who left the Soviet Union in 1926 and settled in Paris where he married Madeleine Ducrocq (1898-1975).
Split into simpler sentences: His mother, Irene Gedevanishvili (1938-2011), is the daughter of Artchil Gedevanishvili (1897-1970), a Georgian aristocrat, who left the Soviet Union in 1926. He settled in Paris where he married Madeleine Ducrocq (1898-1975).