Complex sentence: Raissa Berg was born in St. Petersburg, the second child of Lev Semenovitch Berg and Polina Abramovna Kotlovker, both natives of Bendery, within the Jewish Pale.
Split into simpler sentences: Raissa Berg was born in St. Petersburg, the second child of Lev Semenovitch Berg and his wife, Polina. Lev Berg and his wife were natives of Bendery, within the Jewish Pale.