Complex sentence: Wilcke was born on 11 March 1913 at Schrimm in the Province of Posen, part of the Kingdom of Prussia at the time, now Śrem in the Greater Poland Voivodeship, Poland.
Split into simpler sentences: Wilcke was born on 11 March 1913 in Schrimm in the Province of Posen, at the time a province of the Kingdom of Prussia. Today it is Śrem in the Greater Poland Voivodeship, Poland.