Question: What is the date of death of Iphigénie Decaux-Milet-Moreau's husband?
Sentence (from "Iphigénie Decaux-Milet-Moreau"): In 1800 she married Louis Victor de Blacquetot de Caux and thereafter went by the name "Vicomtesse Iphigenie Decaux".
Relevant evidence: Yes