Question: What is the date of death of Tsarevna Praskovya Ivanovna Of Russia's mother?
Sentence (from "Princess Catherine Ivanovna of Russia"): Princess Catherine Ivanovna of Russia( 12 July 1915( O.S.) – 13 March 2007) was a great- great- granddaughter of Tsar Nicholas I of Russia and a niece of King Alexander I of Yugoslavia.
Relevant evidence: No