Question: Who manufactured the 747, bearing the name of the company that investigated solutions to the Airbus problem?

full_context: Document 1: General Electric GEnx: The General Electric GEnx ("General Electric Next-generation") is an advanced dual rotor, axial flow, high-bypass turbofan jet engine in production by GE Aviation for the Boeing 787 and 747-8. The GEnx is intended to replace the CF6 in GE's product line.
Document 2: Airport: Many large airports are located near railway trunk routes for seamless connection of multimodal transport, for instance Frankfurt Airport, Amsterdam Airport Schiphol, London Heathrow Airport, London Gatwick Airport and London Stansted Airport. It is also common to connect an airport and a city with rapid transit, light rail lines or other non-road public transport systems. Some examples of this would include the AirTrain JFK at John F. Kennedy International Airport in New York, Link Light Rail that runs from the heart of downtown Seattle to Seattle–Tacoma International Airport, and the Silver Line T at Boston's Logan International Airport by the Massachusetts Bay Transportation Authority (MBTA). Such a connection lowers risk of missed flights due to traffic congestion. Large airports usually have access also through controlled-access highways ('freeways' or 'motorways') from which motor vehicles enter either the departure loop or the arrival loop.
Document 3: Boeing 747: The Boeing 747 is an American wide - body commercial jet airliner and cargo aircraft, often referred to by its original nickname, ``Jumbo Jet ''. Its distinctive`` hump'' upper deck along the forward part of the aircraft makes it among the world's most recognizable aircraft, and it was the first wide - body produced. Manufactured by Boeing's Commercial Airplane unit in the United States, the original version of the 747 was envisioned to have 150 percent greater capacity than the Boeing 707, one of the common large commercial aircraft of the 1960s. First flown commercially in 1970, the 747 held the passenger capacity record for 37 years.
Document 4: Airbus A380: The Airbus A380 is a double - deck, wide - body, four - engine jet airliner manufactured by European manufacturer Airbus. It is the world's largest passenger airliner, and the airports at which it operates have upgraded facilities to accommodate it. It was initially named Airbus A3XX and designed to challenge Boeing's monopoly in the large - aircraft market. The A380 made its first flight on 27 April 2005 and entered commercial service on 25 October 2007 with Singapore Airlines. An improved version, the A380plus, is under development.
Document 5: Boeing 747-8: The Boeing 747-8 is a wide-body jet airliner developed by Boeing Commercial Airplanes. It was officially announced in 2005. The 747-8 is the third generation of the 747, with a lengthened fuselage, redesigned wings, new engines, and improved efficiency. The 747-8 is the largest 747 version, the largest commercial aircraft built in the United States, and the longest operational passenger aircraft in the world.
Document 6: Nord Aviation: The company was based in the centre of France, on the site of Bourges airport, in the département of Cher. In 1970, Nord Aviation merged with Sud Aviation to create "Société nationale d'industrie aérospatiale" (SNIAS), later renamed Aérospatiale and ultimately merged into European aerospace corporation Airbus in 2000.
Document 7: Boeing 747: The Boeing 747 is a large, wide-body (two-aisle) airliner with four wing-mounted engines. Its wings have a high sweep angle of 37.5 degrees for a fast, efficient cruise of Mach 0.84 to 0.88, depending on the variant. The sweep also reduces the wingspan, allowing the 747 to use existing hangars. Its seating capacity is over 366 with a 3–4–3 seat arrangement (a cross section of 3 seats, an aisle, 4 seats, another aisle, and 3 seats) in economy class and a 2–3–2 layout in first class on the main deck. The upper deck has a 3–3 seat arrangement in economy class and a 2–2 layout in first class.
Document 8: Airbus A321: The Airbus A321 is a member of the Airbus A320 family of short - to medium - range, narrow - body, commercial passenger twin - engine jet airliners manufactured by Airbus. It was the first derivative of the baseline Airbus A320 aircraft, and carries up to 236 passengers with a maximum range of 3,200 nmi (5,900 km; 3,700 mi). Final assembly of the aircraft takes place in Hamburg, Germany, or Mobile, Alabama.
Document 9: Entwicklungsring Nord: West Germany provided 53.3% of Spacelab's cost and fulfilled 52.6% of all Spacelab work contracts. ERNO VFW Fokker, in competition with MBB, submitted the winning design, and became the prime contractor for Spacelab. MBB in 1981 took over VFW Fokker. The ERNO plant in Bremen continued as the headquarters for Spacelab design, production management, component testing, and assembly. It became a part of EADS Astrium Space Transportation, then Airbus Defence and Space, then Airbus Safran Launchers, and now ArianeGroup.
Document 10: Boeing 747: The combi model, the 747-200M, could carry freight in the rear section of the main deck via a side cargo door. A removable partition on the main deck separated the cargo area at the rear from the passengers at the front. The -200M could carry up to 238 passengers in a three-class configuration with cargo carried on the main deck. The model was also known as the 747-200 Combi. As on the -100, a stretched upper deck (SUD) modification was later offered. A total of 10 converted 747-200s were operated by KLM. Union de Transports Aériens (UTA) also had two aircraft converted.After launching the -200 with Pratt & Whitney JT9D-7 engines, on August 1, 1972 Boeing announced that it had reached an agreement with General Electric to certify the 747 with CF6-50 series engines to increase the aircraft's market potential. Rolls-Royce followed 747 engine production with a launch order from British Airways for four aircraft. The option of RB211-524B engines was announced on June 17, 1975. The -200 was the first 747 to provide a choice of powerplant from the three major engine manufacturers.A total of 393 of the 747-200 versions had been built when production ended in 1991. Of these, 225 were -200B, 73 were -200F, 13 were -200C, 78 were -200M, and 4 were military. Many 747-200s remained in operation, although most large carriers have retired them from their fleets and sold them to smaller operators as of the early 2000s. Large carriers have sped up fleet retirement following the September 11 attacks and the subsequent drop in demand for air travel, scrapping some or turning others into freighters.  Iran Air retired the last passenger 747-200 in May 2016, 36 years after it was delivered. As of July 2018, eight 747-200s remain in service as freighters.
Document 11: Douglas DC-8: The Douglas DC-8 (also known as the McDonnell Douglas DC-8) is an American four-engine mid- to long-range narrow-body jet airliner built from 1958 to 1972 by the Douglas Aircraft Company. Launched after the competing Boeing 707, the DC-8 nevertheless kept Douglas in a strong position in the airliner market, and remained in production until 1972 when it began to be superseded by larger wide-body designs, including the Boeing 747, McDonnell Douglas DC-10, and Lockheed L-1011 TriStar. The DC-8's design allowed it a slightly larger cargo capacity than the 707 and some re-engined DC-8s are still in use as freighters.
Document 12: Boeing 747: After the initial 747-100, Boeing developed the -100B, a higher maximum takeoff weight (MTOW) variant, and the -100SR (Short Range), with higher passenger capacity. Increased maximum takeoff weight allows aircraft to carry more fuel and have longer range. The -200 model followed in 1971, featuring more powerful engines and a higher MTOW. Passenger, freighter and combination passenger-freighter versions of the -200 were produced. The shortened 747SP (special performance) with a longer range was also developed, and entered service in 1976.The 747 line was further developed with the launch of the 747-300 in 1980. The 300 series resulted from Boeing studies to increase the seating capacity of the 747, during which modifications such as fuselage plugs and extending the upper deck over the entire length of the fuselage were rejected. The first 747-300, completed in 1983, included a stretched upper deck, increased cruise speed, and increased seating capacity. The -300 variant was previously designated 747SUD for stretched upper deck, then 747-200 SUD, followed by 747EUD, before the 747-300 designation was used. Passenger, short range and combination freighter-passenger versions of the 300 series were produced.
Document 13: Boeing 747: Boeing 747 Boeing 747 - 100 of Pan American World Airways, the 747's launch customer, in September 1978 Role Wide - body jet airliner National origin United States Manufacturer Boeing Commercial Airplanes First flight February 9, 1969 Introduction January 22, 1970 with Pan American World Airways Status In service Primary users British Airways Lufthansa Korean Air Atlas Air Produced 1968 -- present Number built 1,548 (of which 1,546 delivered to customers) as of July 2018 Program cost US $1 billion at roll - out (1968) 7.0 billion today Unit cost 747 - 100: US $24 million (1972) 747 - 200: US $39 million (1976) 747 - 300: US $83 million (1982) Variants Boeing 747SP Boeing 747 - 400 Boeing 747 - 8 Boeing VC - 25 Boeing E-4 Developed into Boeing YAL - 1 Boeing Dreamlifter
Document 14: Boeing 747: Boeing 747 Boeing 747 - 100 of Pan American World Airways, the 747's launch customer, in September 1978 Role Wide - body jet airliner National origin United States Manufacturer Boeing Commercial Airplanes First flight February 9, 1969 Introduction January 22, 1970 with Pan American World Airways Status In service Primary users British Airways Lufthansa Korean Air Atlas Air Produced 1968 -- present Number built 1,544 as of April 2018 Program cost US $1 billion at roll - out (1968) 7.0 billion today Unit cost 747 - 100: US $24 million (1972) 747 - 200: US $39 million (1976) 747 - 300: US $83 million (1982) Variants Boeing 747SP Boeing 747 - 400 Boeing 747 - 8 Boeing VC - 25 Boeing E-4 Developed into Boeing YAL - 1 Boeing Dreamlifter
Document 15: Airbus: Mirabel, Canada (A220)Airbus, however, has a number of other plants in different European locations, reflecting its foundation as a consortium. An original solution to the problem of moving aircraft parts between the different factories and the assembly plants is the use of the Airbus Beluga, a modified cargo aircraft capable of carrying entire sections of fuselage. This solution has also been investigated by Boeing, which retrofitted 4 747-400s to transport the components of the 787. An exception to this scheme is the A380, whose fuselage and wings are too large for sections to be carried by the Beluga. Large A380 parts are brought by ship to Bordeaux, and then transported to the Toulouse assembly plant by the Itinéraire à Grand Gabarit, a specially enlarged waterway and road route.
ground_truth: Boeing Commercial Airplanes
sub_queries: Who investigated the solution? Answer: Boeing
Boeing 747 >> manufacturer Answer: Boeing Commercial Airplanes