Complex sentence: Initially most fo the Jews were from Alsace regained by France in 1870, at the end ofnineteenth century and early twentieth century many Jewish families from Central Europe, fleeing poverty and pogroms came to Vincennes.
Split into simpler sentences: Initially most fo the Jews were from Alsace, regained by France in 1870. At the end of the 19th amd early 20th centuries, many Jewish families from Central Europe, fleeing poverty and pogroms came to Vincennes.