Question: Who was President of Argentina when César Augusto Guzzetti became the first foreign minister of the military government?
Sentence (from "Isabel Martínez de Perón"): María Estela Martínez Cartas de Perón (born 4 February 1931), better known as Isabel Martínez de Perón (] ) or Isabel Perón, served as President of Argentina from 1974 to 1976.
Relevant evidence: Yes