Complex sentence: She was born Miriam Edez Adelaida Leventon, one of three children of Yakov Leventon and Sonya Horowitz; the Jewish family lived in Yalta, Crimea (then a part of the Russian Empire).
Split into simpler sentences: She was born Miriam Edez Adelaida Leventon, one of three children of Yakov Leventon and Sonya Horowitz. The family was Jewish and lived in Yalta, Crimea (then a part of the Russian Empire).