Complex sentence: He is the third prime minister appointed by President Macky Sall, and has previously served at the Central Bank of West African States, the United Nations Industrial Development Organization and as the President's adviser before his appointment as prime minister.
Split into simpler sentences: He is the third prime minister appointed by President Macky Sall. Dionne served at the Central Bank of West African States, the United Nations Industrial Development Organization, and as the President's adviser before his appointment as prime minister.