Question: Who built the both the Union Church of Pocantico Hills and and Kykuit?
Sentence (from "Kykuit"): Conceived largely by his son, John D. Rockefeller, Jr., and enriched by the art collection of third-generation scion, Governor of New York and Vice President of the United States, Nelson Rockefeller, it has been home to four generations of the family.
Relevant evidence: No