Question: When did Prince Waldemar Of Prussia (1868–1879)'s mother die?
Sentence (from "Princess Elisabeth of Prussia"): Princess Elisabeth of Prussia( 18 June 1815 – 21 March 1885) was the second daughter of Prince Wilhelm of Prussia and Landgravine Marie Anna of Hesse- Homburg and a granddaughter of Frederick William II of Prussia.
Relevant evidence: No