Complex sentence: He was born in Drohobych to a wealthy, Yiddish-Polish-speaking orthodox Jewish family living in Galicia, then part of the Austrian sector of the Partitioned Poland, now Western Ukraine.
Split into simpler sentences: He was born in Drohobych to a wealthy, Yiddish and Polish-speaking orthodox Jewish family living in Galicia. It was then part of the Austrian sector of Partitioned Poland, now Western Ukraine.