Question: What is the date of birth of Prince Oskar Of Prussia's mother?
Sentence (from "Prince Oskar of Prussia"): Prince Oskar Karl Gustav Adolf of Prussia ("Oskar Karl Gustav Adolf Prinz von Preußen"; 27 July 1888 – 27 January 1958) was the fifth son of Wilhelm II, German Emperor and Augusta Victoria of Schleswig-Holstein-Sonderburg-Augustenburg.
Relevant evidence: Yes