Question: What is is a super tall office building currently under construction in the West Side area of Manhattan, 599 Lexington Avenue or 30 Hudson Yards ?

Context paragraphs:
15 Hudson Yards: 15 Hudson Yards is a residential building currently under construction on Manhattan's West Side.  Located in Chelsea near Hell's Kitchen Penn Station area, the building is a part of the Hudson Yards project, a plan to redevelop the Metropolitan Transportation Authority's West Side Yards.  The tower started construction on December 4, 2014.

35 Hudson Yards: 35 Hudson Yards (also Tower E or Equinox Tower) is a mixed-use building currently under construction in Manhattan's West Side and is slated to be composed of apartment units and a hotel.  Located near Hell's Kitchen, Chelsea, and the Penn Station area, the building is a part of the Hudson Yards project, a plan to redevelop the Metropolitan Transportation Authority's West Side Yards.

55 Hudson Yards: 55 Hudson Yards (also known as One Hudson Yards or One Hudson Boulevard) is a future tower just outside the Hudson Yards Redevelopment Project.  Located in Chelsea, Manhattan, it will add a combined 4000000 sqft of space to the Hudson Yards project, along with 50 Hudson Yards, even though the two buildings will be located outside of the redevelopment site itself.

30 Hudson Yards: 30 Hudson Yards (also the North Tower) is a super tall office building currently under construction in the West Side area of Manhattan.  Located near Hell's Kitchen, Chelsea and the Penn Station area, the building is a part of the Hudson Yards Redevelopment Project, a plan to redevelop the Metropolitan Transportation Authority's West Side Yards.

West Side (Manhattan): The West Side of Manhattan refers to the side of Manhattan Island which abuts the Hudson River and faces New Jersey.  Fifth Avenue, Central Park, and lower Broadway separate it from the East Side.  The major neighborhoods on the West Side are (from north to south) West Harlem, Morningside Heights, Manhattan Valley, Upper West Side, Hell's Kitchen, Chelsea, West Village, SoHo, and Tribeca.  The 8th Avenue and West Side subway lines connect all parts of the West Side.  The main north-south roads servicing the West Side are the Henry Hudson Parkway in the north, and the West Side Highway in the south.  The Hudson River Greenway separates them from the west shore of the island.

Myrtle Avenue (BMT Lexington Avenue Line): Myrtle Avenue was a station on the demolished BMT Lexington Avenue Line.  It was opened on May 13, 1885 had two tracks and two side platforms.  It was located at the intersection of Myrtle Avenue and Grand Avenue in Brooklyn, and had connections to Myrtle Avenue Line streetcars.  A segment of the Lexington Avenue Line once ran north from here and turned west on Park Avenue to Hudson Avenue and York Street on its way to the Fulton Ferry until 1891.  The Myrtle Avenue Elevated was built nearby in 1888, and Lexington Avenue Lines trains began to shift onto that line southwest of this station.  It closed on October 13, 1950, although the other BMT station at that location, Grand Avenue was in operation until January 21, 1953, while the rest of the line southwest of Broadway was operational until November 3, 1969.  The next southbound stop was Washington Avenue on the Myrtle Avenue El, but was originally another Washington Avenue station on the Park Avenue El.  The next northbound stop was DeKalb Avenue.

599 Lexington Avenue: 599 Lexington Avenue is a 653 ft (199m) tall, 50-story skyscraper in New York City, New York designed by Edward Larrabee Barnes.  It was the first building constructed by Mortimer Zuckerman and his company Boston Properties in New York City.  The site was acquired for $84 million in 1984, and completed in 1986.

10 Hudson Yards: 10 Hudson Yards is an office building that was completed in 2016 in Manhattan's West Side.  Located near Hell's Kitchen, Chelsea and the Penn Station area, the building is a part of the Hudson Yards urban renewal project, a plan to redevelop the Metropolitan Transportation Authority's West Side Yard.  Coach, Inc. is the anchor tenant.  During planning, the tower was known as the South Tower or Tower C.

500 West 30th Street: 500 West 30th Street (also known as Abington House) is a residential building in Chelsea, in Manhattan, New York City just outside the Hudson Yards Redevelopment Project.  There are 386 rental apartments at the building, located at the southwest corner of 30th Street and Tenth Avenue.  Robert A.M. Stern Architects designed the building, and The Related Companies developed the building.  There is about 7200 ft2 of rental space on the ground floor of the 33-story, 325 ft -tall building; the building also has a pre-fabricated red brick facade.  The building, the first to open in the area under the zoning of the Hudson Yards Redevelopment Project, has 78 permanent units.  It started leasing in April 2014, just two years after beginning construction in 2012.

50 Hudson Yards: 50 Hudson Yards is a building being planned as part of the Hudson Yards Redevelopment Project in Hell's Kitchen, Manhattan.  The planned building is to be located to the north of 30 Hudson Yards, and on the east side of the Hudson Park and Boulevard, adjacent to 55 Hudson Yards.  It will total 2.9 million square feet of commercial space.  At the SW corner of 34th Street and 10th Avenue, it will replace the drive-thru McDonald's that had long-occupied the space.

Supporting paragraphs: 30 Hudson Yards 599 Lexington Avenue
Answer: 30 Hudson Yards