Complex sentence: Alexis Arapoff, was born 1904 in Saint Petersburg (Russia), died in Massachusetts 1948, was a russian prince, painter, first based in France, where he belonged to the École de Paris.
Split into simpler sentences: Alexis Arapoff, was born 1904 in Saint Petersburg (Russia), died in Massachusetts 1948. He a russian prince, painter, first based in France, where he belonged to the École de Paris.