Question: Knife Edge Two Piece 1962–65 is an abstract bronze sculpture by Henry Moore, three casts are on public display, one at which garden at the area, also known also as the John D. Rockefeller Estate, is a 40-room National Trust house in Westchester County, New York?
Context: Man Enters the Cosmos is a cast bronze sculpture by Henry Moore located on the Lake Michigan lakefront outside the Adler Planetarium in the Museum Campus area of downtown Chicago in Cook County, Illinois, United States.  The planetarium, which is both a National Historic Landmark and listed on the National Register of Historic Places, is located in the Near South Side community area of Chicago.  Moore's sculpture is a functional bowstring equatorial sundial created in 1980 measuring approximately 13 ft .  The sundial was formerly located slightly further south at the steps of the main entry plaza to the Planetarium, but it now sits directly on the lakefront.  The work is a later copy of a composition first created in the 1960s for the offices of "The Times" newspaper at Printing House Square in London, and according to the Henry Moore Foundation is titled Sundial 1965–66. Spindle Piece is a bronze sculpture by Henry Moore.  Unusually, the sculpture was made in four sizes: a plaster maquette cast in bronze as "Maquette for Spindle Piece" (LH 591) in 1968, a larger plaster working model which was also cast in bronze as "Spindle Piece" (LH 592) in 1968, a larger series of bronze sculptures "Large Spindle Piece" (LH 593) cast in 1974, and the largest model, known as "The Spindle", carved in travertine in 1981. Large Four Piece Reclining Figure 1972–73 (LH 629) is a bronze sculpture by Henry Moore.  Approximately 4 m long, the sculpture was made an edition of seven full size casts (plus an artist's copy), all cast by the Hermann Noack foundry in Berlin. Knife Edge Two Piece 1962–65 is an abstract bronze sculpture by Henry Moore.  It is one of Moore's earliest sculptures in two pieces, a mode that he started to adopt in 1959.  Its form was inspired by the shape of a bone fragment.  Moore created the sculpture from an edition of 10 working models in 1962; these working models are now in public collections.  Moore created four full-size casts between 1962-1965, with one retained by him.  The three casts are on public display on College Green in Westminster, London, Queen Elizabeth Park in Vancouver, and the garden at Kykuit, the house of the Rockefeller family in Tarrytown, New York.  Moore's own cast is on display at his former studio and estate, 'Hoglands' in Perry Green, Hertfordshire in southern England.  A similar work, "Mirror Knife Edge 1977" (or "Knife Edge Mirror Two Piece"), is displayed at the entrance to I. M. Pei's east wing of the National Gallery of Art in Washington, D.C. The Westminster cast was donated by Moore through the Contemporary Art Society to what he believed was the City of London, but its actual ownership was undetermined for many years.  The Westminster cast subsequently fell into disrepair, and was restored in 2013 after it became part of the British Parliamentary Art Collection; it was granted a Grade II* listing in January 2016. Three Piece Reclining Figure: Draped 1975 is a bronze sculpture by Henry Moore, catalogued as LH 655.  It is approximately 4.7m long.  Seven casts and an artists proof were made.  Three publicly exhibited casts are situated in the Sodra Kungsgatan in Gävle, Sweden at the Massachusetts Institute of Technology in Boston, USA, and at the Henry Moore Foundation in Perry Green, Hertfordshire. Three Piece Sculpture: Vertebrae (LH 580a), also known as Dallas Piece or Vertebrae, is an abstract bronze sculpture by Henry Moore.  It was cast in 1978–79, specifically for a site outside I.M. Pei's Dallas City Hall, and is the largest version of a sculpture that Moore created in 1968. Sheep Piece is a sculpture by Henry Moore made in three sizes from 1969-1972, starting in 1969 with a 14 cm maquette (LH 625) modelled in plaster and then cast in bronze, enlarged in 1971 to a 142 cm working model (LH 626) in plaster and then cast in bronze, and finally a full size bronze (LH 627) on a monumental scale, 570 cm high, cast in 1971-72.  The four full-size casts are at the Henry Moore Foundation in Perry Green, Hertfordshire, in Zürich, in Kansas City, and at the Donald M. Kendall Sculpture Gardens in Purchase, New York. Standing Figure: Knife Edge is a bronze sculpture by the English artist Henry Moore.  It was cast in two full-size versions: "Standing Figure: Knife Edge" (LH 482) in 1961, and a larger "Large Standing Figure: Knife Edge" (LH 482a) in 1976.  The sculpture also is sometimes known as "Standing Figure (Bone)" or "Winged Figure". Large Torso Arch is a public art work by English artist Henry Moore located at the Lynden Sculpture Garden near Milwaukee, Wisconsin.  The bronze sculpture is an abstract, organic bone-like archway; it is installed on the lawn. Kykuit ( ), known also as the John D. Rockefeller Estate, is a 40-room National Trust house in Westchester County, New York, built by order of oil tycoon, capitalist and Rockefeller family patriarch John D. Rockefeller.  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.
Answer: Kykuit