Question: What is the date of birth of Sigismund Iii Vasa's father?
Sentence (from "Aleksander Kazimierz Sapieha"): After the abdication of Jan Kazimierz, he initially supported the candidacy of Philip William, Elector Palatine, the son-in- law of Sigismund III Vasa, but later supported the successful election of Michał Korybut Wiśniowiecki.
Relevant evidence: No