Question: One of the largest natural harbors in the world is federally owned and operated and at the mouth of the Hudson River is part of the Port of which two states?
Sentence (from "Historic preservation in New York"): Private endeavors, such as investment and other choices made by private landowners to conserve historical features of their properties, are significant but less visible and include groups such as the Historic Districts Council, The New York Landmarks Conservancy and the Preservation League of New York State.
Relevant evidence: No