Question: When did Mercedes Jijón's husband die?
Sentence (from "Mercedes Jijón"): María de las Mercedes Jijón de Vivanco y Chiriboga (born 25 March 1811, Otavalo — d. 4 June 1878, Quito) was the first First Lady of Ecuador, serving in that capacity twice alongside her husband, Juan José Flores.
Relevant evidence: Yes