Complex sentence: The Tula Pasternaks belonged to a class of "Jewish Landed Gentry" that resided in the manors of the gentile aristocracy, and managed their agricultural estates, in the case of the Pasternaks the estates were in the vicinity of Yasnaya Polyana, Leo Tolstoy's estate.
Split into simpler sentences: The Tula Pasternaks belonged to a class of "Jewish Landed Gentry" that resided in the manors of the gentile aristocracy, and managed their agricultural estates. In the case of the Pasternaks the estates were in the vicinity of Yasnaya Polyana, Leo Tolstoy's estate.