Question: When did Zofia Czartoryska's mother die?
Sentence (from "Izabela Czartoryska"): Elżbieta "Izabela" Dorota Czartoryska ("née" Flemming; 3 March 1746 – 15 July 1835) was a Polish princess, writer, and art collector who is widely regarded as a very prominent figure of the Enlightenment in Poland.
Relevant evidence: Yes