dkoterwa/mlqa_filtered huggingface dataset:
One of the principal technologies that enabled an aircraft as large as the 747 to be drawn up was the high-bypass turbofan engine. The engine technology was thought to be capable of delivering double the power of the earlier turbojets while consuming one–third less fuel. General Electric had pioneered the concept but was committed to developing the engine for the C-5 Galaxy and did not enter the commercial market until later. Pratt & Whitney was also working on the same principle and, by late 1966, Boeing, Pan Am and Pratt & Whitney agreed to develop a new engine, designated the JT9D to power the 747.The project was designed with a new methodology called fault tree analysis, which allowed the effects of a failure of a single part to be studied to determine its impact on other systems. To address concerns about safety and flyability, the 747's design included structural redundancy, redundant hydraulic systems, quadruple main landing gear and dual control surfaces. Additionally, some of the most advanced high-lift devices used in the industry were included in the new design, to allow it to operate from existing airports. These included slats running almost the entire length of the wing, as well as complex three-part slotted flaps along the trailing edge of the wing. The wing's complex three-part flaps increase wing area by 21 percent and lift by 90 percent when fully deployed compared to their non-deployed configuration.Boeing agreed to deliver the first 747 to Pan Am by the end of 1969. The delivery date left 28 months to design the aircraft, which was two-thirds of the normal time. The schedule was so fast-paced that the people who worked on it were given the nickname "The Incredibles". Developing the aircraft was such a technical and financial challenge that management was said to have "bet the company" when it started the project.

Question: What attribute was given to high lift devices with the new design?
Answer: allow it to operate from existing airports
The 747 enjoyed a fairly smooth introduction into service, overcoming concerns that some airports would not be able to accommodate an aircraft that large. Although technical problems occurred, they were relatively minor and quickly solved. After the aircraft's introduction with Pan Am, other airlines that had bought the 747 to stay competitive began to put their own 747s into service.  Boeing estimated that half of the early 747 sales were to airlines desiring the aircraft's long range rather than its payload capacity.  While the 747 had the lowest potential operating cost per seat, this could only be achieved when the aircraft was fully loaded; costs per seat increased rapidly as occupancy declined. A moderately loaded 747, one with only 70 percent of its seats occupied, used more than 95 percent of the fuel needed by a fully occupied 747. Nonetheless, many flag-carriers purchased the 747 due to its prestige "even if it made no sense economically" to operate. During the 1970s and 1980s, there was often over 30 regularly scheduled 747s at John F. Kennedy International Airport.The recession of 1969-1970 greatly affected Boeing. For the year and a half after September 1970 it only sold two 747s in the world, and did not sell any to an American carrier for almost three years. When economic problems in the US and other countries after the 1973 oil crisis led to reduced passenger traffic, several airlines found they did not have enough passengers to fly the 747 economically, and they replaced them with the smaller and recently introduced McDonnell Douglas DC-10 and Lockheed L-1011 TriStar trijet wide bodies (and later the 767 and A300/A310 twinjets). Having tried replacing coach seats on its 747s with piano bars in an attempt to attract more customers, American Airlines eventually relegated its 747s to cargo service and in 1983 exchanged them with Pan Am for smaller aircraft; Delta Air Lines also removed its 747s from service after several years. Later, Delta acquired 747s again in 2008 as part of its merger with Northwest Airlines, although it retired the 747-400 fleet in December 2017.

Question: What increases as the number of passengers in an airplane declines?
Answer: costs per seat

Question: With what did American Airlines replace its 747s' coach seats before converting the aircraft to cargo service?
Answer: piano bars

Question: How fast were problems solved?
Answer: quickly
The 747 was conceived while air travel was increasing in the 1960s. The era of commercial jet transportation, led by the enormous popularity of the Boeing 707 and Douglas DC-8, had revolutionized long-distance travel. Even before it lost the CX-HLS contract, Boeing was asked by Juan Trippe, president of Pan American World Airways (Pan Am), one of their most important airline customers, to build a passenger aircraft more than twice the size of the 707. During this time, airport congestion, worsened by increasing numbers of passengers carried on relatively small aircraft, became a problem that Trippe thought could be addressed by a larger new aircraft.In 1965, Joe Sutter was transferred from Boeing's 737 development team to manage the design studies for the new airliner, already assigned the model number 747. Sutter began a design study with Pan Am and other airlines, to better understand their requirements. At the time, it was widely thought that the 747 would eventually be superseded by supersonic transport aircraft. Boeing responded by designing the 747 so that it could be adapted easily to carry freight and remain in production even if sales of the passenger version declined. In the freighter role, the clear need was to support the containerized shipping methodologies that were being widely introduced at about the same time. Standard shipping containers are 8 ft (2.4 m) square at the front (slightly higher due to attachment points) and available in 20 and 40 ft (6.1 and 12 m) lengths. This meant that it would be possible to support a 2-wide 2-high stack of containers two or three ranks deep with a fuselage size similar to the earlier CX-HLS project.

Question: What two favored airplanes have transformed long-distance travel?
Answer: Boeing 707 and Douglas DC-8
The 747-300 features a 23-foot-4-inch-longer (7.11 m) upper deck than the -200. The stretched upper deck has two emergency exit doors and is the most visible difference between the -300 and previous models. Before being made standard on the 747-300, the stretched upper deck was previously offered as a retrofit, and appeared on two Japanese 747-100SR aircraft. The 747-300 introduced a new straight stairway to the upper deck, instead of a spiral staircase on earlier variants, which creates room above and below for more seats. Minor aerodynamic changes allowed the -300's cruise speed to reach Mach 0.85 compared with Mach 0.84 on the -200 and -100 models, while retaining the same takeoff weight. The -300 could be equipped with the same Pratt & Whitney and Rolls-Royce powerplants as on the -200, as well as updated General Electric CF6-80C2B1 engines.Swissair placed the first order for the 747-300 on June 11, 1980. The variant revived the 747-300 designation, which had been previously used on a design study that did not reach production. The 747-300 first flew on October 5, 1982, and the type's first delivery went to Swissair on March 23, 1983. Besides the passenger model, two other versions (-300M, -300SR) were produced. The 747-300M features cargo capacity on the rear portion of the main deck, similar to the -200M, but with the stretched upper deck it can carry more passengers. The 747-300SR, a short range, high-capacity domestic model, was produced for Japanese markets with a maximum seating for 584. No production freighter version of the 747-300 was built, but Boeing began modifications of used passenger -300 models into freighters in 2000.A total of 81 747-300 series aircraft were delivered, 56 for passenger use, 21 -300M and 4 -300SR versions. In 1985, just two years after the -300 entered service, the type was superseded by the announcement of the more advanced 747-400. The last 747-300 was delivered in September 1990 to Sabena.  While some -300 customers continued operating the type, several large carriers replaced their 747-300s with 747-400s. Air France, Air India, Pakistan International Airlines, and Qantas were some of the last major carriers to operate the 747-300. On December 29, 2008, Qantas flew its last scheduled 747-300 service, operating from Melbourne to Los Angeles via Auckland.  In July 2015, Pakistan International Airlines retired their final 747-300 after 30 years of service. As of July 2018, only five 747-300s remain in commercial service, with Max Air (3), Mahan Air (1) and TransAVIAexport Airlines (1).

Question: Who received the final 747-300?
Answer: Sabena
The 747-400 Dreamlifter (originally called the 747 Large Cargo Freighter or LCF) is a Boeing-designed modification of existing 747-400s to a larger configuration to ferry 787 Dreamliner sub-assemblies. Evergreen Aviation Technologies Corporation of Taiwan was contracted to complete modifications of 747-400s into Dreamlifters in Taoyuan. The aircraft flew for the first time on September 9, 2006 in a test flight. Modification of four aircraft was completed by February 2010. The Dreamlifters have been placed into service transporting sub-assemblies for the 787 program to the Boeing plant in Everett, Washington, for final assembly. The aircraft is certified to carry only essential crew and not passengers.

Question: who was contracted for the job
Answer: Evergreen Aviation Technologies Corporation of Taiwan
The 747-400 is an improved model with increased range. It has wingtip extensions of 6 ft (1.8 m) and winglets of 6 ft (1.8 m), which improve the type's fuel efficiency by four percent compared to previous 747 versions. The 747-400 introduced a new glass cockpit designed for a flight crew of two instead of three, with a reduction in the number of dials, gauges and knobs from 971 to 365 through the use of electronics. The type also features tail fuel tanks, revised engines, and a new interior. The longer range has been used by some airlines to bypass traditional fuel stops, such as Anchorage. Powerplants include the Pratt & Whitney PW4062, General Electric CF6-80C2, and Rolls-Royce RB211-524. As a result of the Boeing 767 development overlapping with the 747-400's development, both aircraft can use the same three powerplants and are even interchangeable between the two aircraft models.The -400 was offered in passenger (-400), freighter (-400F), combi (-400M), domestic (-400D), extended range passenger (-400ER), and extended range freighter (-400ERF) versions. Passenger versions retain the same upper deck as the -300, while the freighter version does not have an extended upper deck. The 747-400D was built for short-range operations with maximum seating for 624. Winglets were not included, but they can be retrofitted. Cruising speed is up to Mach 0.855 on different versions of the 747-400.

Question: What type of interior did this type have?
Answer: new
The 747-8 Freighter, or 747-8F, is derived from the 747-400ERF. The variant has 16% more payload capacity than its predecessor, allowing it to carry seven more standard air cargo containers, with a maximum payload capacity of 154 tons (140 tonnes) of cargo. As on previous 747 freighters, the 747-8F features an overhead nose-door and a side-door on the main deck plus a side-door on the lower deck ("belly") to aid loading and unloading.  The 747-8F made its maiden flight on February 8, 2010. The variant received its amended type certificate jointly from the FAA and the European Aviation Safety Agency (EASA) on August 19, 2011.  The -8F was first delivered to Cargolux on October 12, 2011.The passenger version, named 747-8 Intercontinental or 747-8I, is designed to carry up to 467 passengers in a 3-class configuration and fly more than 8,000 nmi (15,000 km) at Mach 0.855. As a derivative of the already common 747-400, the 747-8 has the economic benefit of similar training and interchangeable parts. The type's first test flight occurred on March 20, 2011. The 747-8 has surpassed the Airbus A340-600 as the world's longest airliner. The first -8I was delivered in May 2012 to Lufthansa. The 747-8 has received 150 total orders, including 103 for the -8F and 47 for the -8I as of July 2018.

Question: Which plane has the greatest length?
Answer: 747-8
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.

Question: How many aisles are within the Boeing 747?
Answer: two

Question: How many people can this venue accommodate?
Answer: over 366
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.

Question: How many class configurations did the 747-200m have?
Answer: three

Question: KLM was responsible for approximately how many 747-200s?
Answer: 10
The development of the 747SP stemmed from a joint request between Pan American World Airways and Iran Air, who were looking for a high-capacity airliner with enough range to cover Pan Am's New York–Middle Eastern routes and Iran Air's planned Tehran–New York route. The Tehran–New York route, when launched, was the longest non-stop commercial flight in the world. The 747SP is 48 feet 4 inches (14.73 m) shorter than the 747-100. Fuselage sections were eliminated fore and aft of the wing, and the center section of the fuselage was redesigned to fit mating fuselage sections. The SP's flaps used a simplified single-slotted configuration. The 747SP, compared to earlier variants, had a tapering of the aft upper fuselage into the empennage, a double-hinged rudder, and longer vertical and horizontal stabilizers. Power was provided by Pratt & Whitney JT9D-7(A/F/J/FW) or Rolls-Royce RB211-524 engines.The 747SP was granted a supplemental certificate on February 4, 1976 and entered service with launch customers Pan Am and Iran Air that same year. The aircraft was chosen by airlines wishing to serve major airports with short runways. A total of 45 747SPs were built, with the 44th 747SP delivered on August 30, 1982. In 1987, Boeing re-opened the 747SP production line after five years to build one last 747SP for an order by the United Arab Emirates government. In addition to airline use, one 747SP was modified for the NASA/German Aerospace Center SOFIA experiment.  Iran Air is the last civil operator of the type; its final 747-SP (EP-IAC) was to be retired in June 2016.

Question: What two airlines requested the 747SP?
Answer: Pan American World Airways and Iran Air
The first 747-100s were built with six upper deck windows (three per side) to accommodate upstairs lounge areas. Later, as airlines began to use the upper deck for premium passenger seating instead of lounge space, Boeing offered a ten-window upper deck as an option. Some early -100s were retrofitted with the new configuration. The -100 was equipped with Pratt & Whitney JT9D-3A engines. No freighter version of this model was developed, but many 747-100s were converted into freighters. A total of 168 747-100s were built; 167 were delivered to customers, while Boeing kept the prototype, City of Everett.

Question: What is the specification of the first 747-100s?
Answer: six upper deck windows (three per side)
The huge cost of developing the 747 and building the Everett factory meant that Boeing had to borrow heavily from a banking syndicate. During the final months before delivery of the first aircraft, the company had to repeatedly request additional funding to complete the project. Had this been refused, Boeing's survival would have been threatened. The firm's debt exceeded $2 billion, with the $1.2 billion owed to the banks setting a record for all companies. Allen later said, "It was really too large a project for us." Ultimately, the gamble succeeded, and Boeing held a monopoly in very large passenger aircraft production for many years.

Question: The building of what factory took a financial toll on Boeing?
Answer: Everett
Ultimately, the high-winged CX-HLS Boeing design was not used for the 747, although technologies developed for their bid had an influence. The original design included a full-length double-deck fuselage with eight-across seating and two aisles on the lower deck and seven-across seating and two aisles on the upper deck. However, concern over evacuation routes and limited cargo-carrying capability caused this idea to be scrapped in early 1966 in favor of a wider single deck design.  The cockpit was, therefore, placed on a shortened upper deck so that a freight-loading door could be included in the nose cone; this design feature produced the 747's distinctive "bulge". In early models it was not clear what to do with the small space in the pod behind the cockpit, and this was initially specified as a "lounge" area with no permanent seating. (A different configuration that had been considered in order to keep the flight deck out of the way for freight loading had the pilots below the passengers, and was dubbed the "anteater".)

Question: What did the first 747s have behind the place where the pilots sit?
Answer: lounge
The city was announced by Saudi Crown Prince Mohammad bin Salman at the Future Investment Initiative conference in Riyadh, Saudi Arabia on October 24, 2017. He said it will operate independently from the “existing governmental framework” with its own tax and labor laws and an "autonomous judicial system."The initiative emerged from Saudi Vision 2030, a plan that seeks to reduce Saudi Arabia's dependence on oil, diversify its economy, and develop public service sectors. The German Klaus Kleinfeld, former chairman and CEO of Alcoa Inc., and former president and CEO of Siemens AG, will direct the development of the city. Plans call for robots to perform functions such as security, logistics, home delivery, and caregiving and for the city to be powered solely with wind and solar power. Because the city will be designed and constructed from scratch, other innovations in infrastructure and mobility have been suggested. Planning and construction will be initiated with $500 billion from the Public Investment Fund of Saudi Arabia and international investors. The first phase of the project is scheduled for completion by 2025.

Question: Who will be in charge of directing the city development?
Answer: The German Klaus Kleinfeld, former chairman and CEO of Alcoa Inc., and former president and CEO of Siemens AG
Guttannen lies in the Bernese Oberland near Grimsel Pass. It is the highest settlement in the Haslital, and the municipality encompasses the upper stretches of that valley as far as the summit of the Grimsel Pass. The adjacent municipalities from the north clockwise are Innertkirchen, Obergoms, Münster-Geschinen, Fieschertal and Grindelwald.The Aare springs from glaciers in Guttannen. There are four lakes in the municipality: Lake Oberaar, Lake Grimsel, Lake Räterichsboden and Lake Gelmer. In the western part of the municipality are the mountains Schreckhorn, Lauteraarhorn, Finsteraarhorn, Agassizhorn and Sidelhorn. Guttannen also includes Finsteraar Glacier, Lauteraar Glacier, Unteraar Glacier, Grueben Glacier, and Bächli Glacier.By Swiss standards, the municipality is large in area; by comparison it is larger than the entire Canton of Appenzell Innerrhoden. In elevation it stretches from the valley floor which is between 800–1,300 m (2,600–4,300 ft) into the high alpine peaks of the Finsteraarhorn group.

Question: Which municipality in Switzerland contains Lake Oberaar, Lake Grimsel, Lake Raterichsboden, and Lake Gelmer?
Answer: Guttannen
In April 2012, AB Entertainment officially announced members Yuji, Dami, and Haeryeong's departure and said in a statement that Yuji and Dami had left the group to focus on their studies, while Haeryeong had left to pursue an acting career. They were replaced by Solji, a former member of vocal duo 2NB, and Hyelin, who was originally considered for EXID's original lineup before she was dropped. With the new members, EXID returned in August 2012 with their second single "I Feel Good" from their first EP Hippity Hop. Hippity Hop debuted at number 13 on the Gaon Albums Chart, selling 1,500 copies. EXID released the digital single "Every Night", in October. The title track is an alternate version of LE's self-written song "Phone Call", which was recorded in their debut EP. "Every Night" debuted at number 43 on the Gaon Singles Chart, selling 105,000 digital copies.

Question: What number did Every Night debut at?
Answer: 43
In May 2011, producer Shinsadong Tiger and AB Entertainment scouted several trainees from JYP Entertainment to form a new girl group. Trainee Yuji was the first to join when a JYP girl group failed to debut. Yuji contacted the trainees Hani, Haeryeong, and Junghwa to audition for AB, and all three were subsequently accepted into the agency. The group added a fifth member when Shinsadong Tiger discovered LE, an underground rapper and songwriter who performed under the name Elly. Dami, who was already an AB trainee, was the sixth and last member added to the group. Originally named "WT", an acronym for "Who's That", the group changed their name to EXID a few months before their debut. In December 2011, LE was featured in Huh Gak's single "Whenever You Play That Song", which appeared on Korean music charts. EXID was scheduled to debut in January 2012, but their debut was delayed to February when LE sustained a leg injury during rehearsals. On February 3, AB Entertainment announced that EXID would debut with the single "Whoz That Girl". Video teasers featuring the members doing solo performances were subsequently released online.

Question: Who joined the group after the three original girls?
Answer: Elly
The plant reaches 30 to 60 cm (12 to 24 in) tall with erect or ascending stems.

Question: How tall, in centimeters, does the plant usually get?
Answer: 30 to 60 cm