Question: What is the date of death of Juana Del Pino Y Vera Mujica's husband?
Sentence (from "Juana del Pino y Vera Mujica"): (December 21, 1786 - December 14, 1841) was the daughter of the viceroy of the Río de la Plata Joaquín del Pino and wife of Bernardino Rivadavia, first President of Argentina, and therefore the first woman to become First Lady of Argentina.
Relevant evidence: Yes