Question: When did Ahmed Osman (Politician)'s wife die?
Sentence (from "Ahmed Osman (politician)"): Secretary General Ministry of National Defence (1959–1961), Ambassador to Federal Republic of Germany (1961–1962), and the United States (1967–1972), Under Secretary Ministry of Mines and Industry (1962–1964), President of the Moroccan General Navigation Company (1964–1967), Prime Minister (1972–1979), President of the National Rally of Independents (RNI) since 1977, President of the National Assembly (1984–1992).
Relevant evidence: No