Complex sentence: The Paul H. Nitze School of Advanced International Studies (SAIS), a division of Johns Hopkins University based in Washington, D.C., United States, is a graduate school devoted to the study of international affairs, economics, diplomacy, and policy research and education.
Split into simpler sentences: The Paul H. Nitze School of Advanced International Studies (SAIS) is a division of Johns Hopkins University based in Washington, D.C., United States. The (institution) is devoted to the study of international affairs, economics, diplomacy, and policy research and education.