Question: When did Konstantine Bagration Of Mukhrani (1889–1915)'s wife die?
Sentence (from "Princess Tatiana Constantinovna of Russia"): (Russian: Княжна Татьяна Константиовна; 23 January 1890 – 28 August 1979) was the third child and oldest daughter of Grand Duke Konstantin Konstantinovich of Russia and wife, Princess Elisabeth of Saxe-Altenburg.
Relevant evidence: Yes