Question: Who owned the electrified railway line which Newark Liberty International Airport Station (also known as Newark International Airport Station) is a railroad station on 
Context: Route 21 is a highway in northern New Jersey, running 14.35 mi from the Newark Airport Interchange with U.S. Route 1/9 and U.S. Route 22 in Newark, Essex County to an interchange with U.S. Route 46 in Clifton, Passaic County.  The route is a four- to six-lane divided highway known as McCarter Highway on its southern portion in Newark that serves as a connector between the Newark and Paterson areas, following the west bank of the Passaic River for much of its length.  It also serves as the main north–south highway through the central part of Newark, connecting attractions in downtown Newark with the Newark Liberty International Airport.  The portion of Route 21 through Newark is a surface arterial that runs alongside the elevated Northeast Corridor rail line through the southern part of the city and continues north through Downtown Newark while the portion north of Downtown Newark is a freeway.  Route 21 intersects many major roads including Interstate 78, Route 27, and Interstate 280 in Newark, Route 7 in Belleville, and Route 3 in Clifton. AirTrain Newark is a 3-mile (4.8 km) monorail system connecting the terminals at Newark Liberty International Airport (EWR) and trains at Newark Liberty International Airport Station on the Northeast Corridor (NEC), where transfers are possible to Amtrak and New Jersey Transit's Northeast Corridor Line and North Jersey Coast Line The Meitetsu Airport Line (名鉄空港線 , Meitetsu Kūkō-sen ) is a railway line in Aichi Prefecture, Japan, operated by the private railway operator Nagoya Railroad (Meitetsu), connecting Tokoname Station and Central Japan International Airport Station in Tokoname.  The line opened, dual track and electrified, on 29 January 2005, and features a 1,076 m bridge over Ise Bay to the artificial island where the airport is situated.  The line is operated as an extension of the Meitetsu Tokoname Line. World Airways Flight 30 was a McDonnell Douglas DC-10-30CF airliner which suffered a fatality incident upon landing at Boston Logan International Airport in Boston, Massachusetts, USA after departing Newark International Airport (now Newark Liberty International Airport), Newark, New Jersey, USA on January 23, 1982. Newark Liberty International Airport Station (also known as Newark International Airport Station) is a railroad station on the Northeast Corridor (NEC) in Newark, New Jersey.  The station provides access to Newark Liberty International Airport (EWR) via the AirTrain monorail which connects the station to the airport's terminals and parking areas.  It is served by New Jersey Transit's (NJT) Northeast Corridor Line and North Jersey Coast Line and Amtrak's "Northeast Regional" and Keystone Service trains.  The station, located in the Dayton neighborhood of the city, has no pedestrian access, bus service, parking facility, or drop-off area. Newark Liberty International Airport (IATA: EWR, ICAO: KEWR, FAA LID: EWR) , originally Newark Metropolitan Airport and later Newark International Airport, is the primary airport serving the U.S. state of New Jersey.  The airport straddles the boundary between the cities of Elizabeth and Newark, the latter of which is the most populous city in the state.  The airport is owned jointly by the cities of Elizabeth and Newark and leased to and operated by the Port Authority of New York and New Jersey. The Newark Metropolitan Airport Buildings are at Newark Liberty International Airport in Newark, New Jersey.  Newark Metropolitan, opened in 1928, was the first major airport in the United States.  The trio of Art Deco buildings, the Administration Building, Brewster Hangar and the Medical Building, were built in 1934 and dedicated by Amelia Earhart in 1935.  They were added to state and federal registers of historic places in 1980.  In 2001, the Administration Building was relocated when a runway was lengthened, and they have subsequently been renovated.  The terminal was once adorned with murals by Arshile Gorky, only two of which survive and are part of the Newark Museum collection The Northeast Corridor (NEC) is an electrified railway line in the Northeast megalopolis of the United States.  Owned primarily by Amtrak, it runs from Boston through Providence, New York City, Philadelphia, and Baltimore to Washington, D.C..  The NEC closely parallels Interstate 95 for most of its length, and is the busiest passenger rail line in the United States by ridership and service frequency as of 2013.  Branches to Harrisburg, Pennsylvania, and Springfield, Massachusetts, though not considered part of the Northeast Corridor, see frequent service from routes that run largely on the corridor. Lishe International Airport Station is an underground metro station in Ningbo, Zhejiang, China.  Lishe International Airport Station is a terminal station of Line 2, Ningbo Rail Transit.  It situates on the south of planned Terminal 2 of Ningbo Lishe International Airport.  Construction of the station starts in December 2010 and opened to service in September 26, 2015. Hoboken Terminal is one of the New York metropolitan area's major transportation hubs.  The commuter-oriented intermodal facility is in Hoboken, Hudson County, New Jersey, United States.  It is served by nine NJ Transit (NJT) commuter rail lines, one Metro-North Railroad line, various NJT buses and private bus lines, the Hudson–Bergen Light Rail, the Port Authority Trans Hudson (PATH) rapid transit system, and NY Waterway-operated ferries.  More than 50,000 people use the terminal daily, making it New Jersey's second-busiest railroad station and its third-busiest transportation facility, after Newark Liberty International Airport and Newark's Penn station.  Hoboken Terminal is wheelchair accessible, with high-level platforms for light rail and PATH services and portable lifts for commuter rail services.
Answer: Amtrak