Question: Who is Janusz Aleksander Sanguszko's maternal grandfather?
Sentence (from "Marianna Lubomirska"): Daughter of Grand Marshal of the Crown Józef Karol Lubomirski, the son of Voivode of Kraków Aleksander Michał Lubomirski and Princess Helena Tekla Ossolińska and Princes Teofila Ludwika Zasławska, the daughter of Prince Władysław Dominik Zasławski and Katarzyna Sobieska (sister of King of Poland Jan III Sobieski).
Relevant evidence: Yes