With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Boeing 777s are jet airliners in the same family.
text_B: The Boeing 777 is a family of long-range wide-body twin-engine jet airliners developed and manufactured by Boeing Commercial Airplanes .. long-range. Long-haul. wide-body. Wide-body aircraft. twin-engine. Twinjet. Boeing Commercial Airplanes. Boeing Commercial Airplanes. range. Range ( aircraft ). It is the world 's largest twinjet and has a typical seating capacity of 314 to 396 passengers , with a range of 5240 to .. twinjet. twinjet. range. Range ( aircraft ). Commonly referred to as the `` Triple Seven '' , its distinguishing features include the largest-diameter turbofan engines of any aircraft , six wheels on each main landing gear , fully circular fuselage cross-section , and a blade-shaped tail cone .. turbofan. turbofan. landing gear. landing gear. Developed in consultation with eight major airlines , the 777 was designed to replace older wide-body airliners and bridge the capacity difference between Boeing 's 767 and 747 .. wide-body. Wide-body aircraft. Boeing 767. Boeing 747. As Boeing 's first fly-by-wire airliner , it has computer-mediated controls .. fly-by-wire. fly-by-wire. It was also the first commercial aircraft to be designed entirely with computer-aided design .. computer-aided design. computer-aided design. commercial aircraft. commercial aircraft. The 777 is produced in two fuselage lengths .. The original 777-200 variant entered commercial service in 1995 , followed by the extended-range 777-200ER in 1997 .. range. Range ( aircraft ). The stretched 777-300 , which is 33.25 ft longer , followed in 1998 .. The initial 777-200 , -200 ER and -300 versions are equipped with General Electric GE90 , Pratt & Whitney PW4000 , or Rolls-Royce Trent 800 engines .. General Electric GE90. General Electric GE90. Pratt & Whitney PW4000. Pratt & Whitney PW4000. Rolls-Royce Trent 800. Rolls-Royce Trent 800. The extended-range 777-300ER and ultra long-range 777-200LR variants entered service in 2004 and 2006 respectively , while the 777F , a freighter version , debuted in February 2009 ; these variants all feature high-output GE90 engines and extended raked wingtips .. long-range. Long-haul. range. Range ( aircraft ). freighter. Cargo aircraft. raked wingtips. Wingtip device#raked wingtip. The 777-200LR is the world 's longest-range airliner , able to fly more than halfway around the globe , and holds the record for the longest distance flown non-stop by a commercial aircraft .. range. Range ( aircraft ). flown non-stop. Non-stop flight. commercial aircraft. commercial aircraft. The 777 first entered commercial service with United Airlines on June 7 , 1995 .. United Airlines. United Airlines. It has received more orders than any other wide-body airliner ; as of April 2017 , 60 customers had placed orders for 1,911 aircraft of all variants , with 1,484 delivered .. wide-body. Wide-body aircraft. The most common and successful variant is the 777-300ER with 725 delivered and 815 orders ; Emirates operates the largest 777 fleet , with 157 passenger and freighter aircraft as of July 2016 .. freighter. Cargo aircraft. Emirates. Emirates ( airline ). The 777 has been involved in six hull losses as of October 2016 ; the Asiana Airlines Flight 214 accident in July 2013 was its first fatal crash in 18 years of service .. Asiana Airlines Flight 214. Asiana Airlines Flight 214. The 777 ranks as one of Boeing 's best-selling models .. Airlines have acquired the type as a comparatively fuel-efficient alternative to other wide-body jets and have increasingly deployed the aircraft on long-haul transoceanic routes .. wide-body. Wide-body aircraft. fuel-efficient. Fuel efficiency. Direct market competitors include the Airbus A330-300 , the Airbus A350 XWB , and the out-of-production A340 and McDonnell Douglas MD-11 .. Airbus A330-300. Airbus A330. Airbus A350 XWB. Airbus A350 XWB. A340. Airbus A340. McDonnell Douglas MD-11. McDonnell Douglas MD-11. The 787 Dreamliner , which entered service in 2011 , shares design features and a common type rating for pilots with the 777 .. 787 Dreamliner. Boeing 787 Dreamliner. type rating. type rating. In November 2013 , Boeing announced the development of upgraded 777-8 and 777-9 variants , collectively named 777X , featuring composite wings and GE9X engines and further technologies developed for the 787 .. 777X. Boeing 777X. The new 777X series is planned to enter service by 2020 .. 777X. Boeing 777X
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