Context: Bats are mammals of the order Chiroptera (from the - "cheir", "hand" and - "pteron", "wing") whose forelimbs form webbed wings, making them the only mammals naturally capable of true and sustained flight. By contrast, other mammals said to fly, such as flying squirrels, gliding possums, and colugos, can only glide for short distances. Bats do not flap their entire forelimbs, as birds do, but instead flap their spread-out digits, which are very long and covered with a thin membrane or patagium., Alexander Alexandrovich Mikulin (February 14 (O.S. February 2), 1895, Vladimir  May 13, 1985, Moscow) was a Soviet aircraft engine designer and chief designer in the Mikulin OKB. His achievements include the first Soviet liquid-cooled piston aircraft engine Mikulin AM-34 and the Mikulin AM-3 turbojet engine for Soviet Union's first jet airliner Tupolev Tu-104. Mikulin also took part in the Tsar Tank project., Artillery is a class of large military weapons built to fire munitions far beyond the range and power of infantry's small arms. Early artillery development focused on the ability to breach fortifications, and led to heavy, fairly immobile siege engines. As technology improved, lighter, more mobile field artillery developed for battlefield use. This development continues today; modern self-propelled artillery vehicles are highly mobile weapons of great versatility providing the largest share of an army's total firepower., Boris Sergeyevich Stechkin ( 1891 -- 1969 ) was Russian scientist , engineer and inventor . He developed a theory of heat engines and was involved in construction of many Soviet aircraft engines . He was also co-developer of Sikorsky Ilya Muromets ( the first four - engine airplane and bomber , 1913 ) and Lebedenko 's Tsar Tank ( the largest armored vehicle in history , 1916 - 1917 ) ., A bomber is a combat aircraft designed to attack ground and sea targets by dropping air-to-ground weaponry, firing torpedoes or deploying air-launched cruise missiles., The Sikorsky "Ilya Muromets" (Sikorsky S-22, S-23, S-24, S-25, S-26 and S-27) are a class of Russian pre-World War I large four-engine commercial airliners and heavy military bombers used during World War I by the Russian Empire. The aircraft series was named after Ilya Muromets, a hero from Slavic mythology. The series was based on the Russky Vityaz or Le Grand, the world's first four-engined aircraft, designed by Igor Sikorsky. The Ilya Muromets aircraft as it appeared in 1913 was a revolutionary design, intended for commercial service with its spacious fuselage incorporating a passenger saloon and washroom on board. During World War I, it became the first four-engine bomber to equip a dedicated strategic bombing unit. This heavy bomber was unrivaled in the early stages of the war, as the Central Powers had no aircraft capable enough to rival it until much later, with the 1916-17 origin Zeppelin-Staaken R.VI, the only example of any of the Imperial German "Riesenflugzeug" airframe designs to be produced in any quantity during World War I., The Tsar Tank, also known as the Netopyr' () which stands for "Pipistrellus" (a genus of bat) or Lebedenko Tank ( ), was an unusual Russian armoured vehicle developed by Nikolai Lebedenko ( ), Nikolai Zhukovsky ( ), Boris Stechkin ( ), and Alexander Mikulin ( ) from 1914 onwards. The project was scrapped after initial tests deemed the vehicle to be underpowered and vulnerable to artillery fire., A Riesenflugzeug (plural "Riesenflugzeuge", German for "giant aircraft"), sometimes colloquially referred to in English as an R-plane, was a large World War I German bomber, possessing at least three aircraft engines, more usually being powered by four or more engines, sometimes of more than one make, model or power level. These were large multi-engine aircraft capable of flying several hours with larger bomb loads than the smaller "Grossflugzeug" bombers such as the Gotha G.V. Some of the earliest "Riesenflugzeuge" were given G-type designations before being redesignated, but a major distinction was that the requirements for the R-type specified that the engines had to be serviceable in flight. As a result, designs fell into two groups - those with the engines mounted centrally inside the fuselage using gearboxes and driveshafts to transfer the power to propellers mounted between the wings, and those with conventional powerplant installations mounted in large nacelles or the nose of the aircraft where engineers would be stationed for each group of engines. The transmission of power from the centrally mounted engines to the remote, most often wing-mounted propellers proved troublesome in practice and most operational examples of "Riesenflugzeug"-class aircraft were of the second type, as with the all-direct-drive Zeppelin-Staaken R.VI., The Central Powers , consisting of Germany, , the Ottoman Empire and Bulgaria  hence also known as the Quadruple Alliance  was one of the two main factions during World War I (191418). It faced and was defeated by the Allied Powers that had formed around the Triple Entente, after which it was dissolved., Russia, also officially known as the Russian Empire, was a state that existed from 1721 until it was overthrown by the short-lived liberal February Revolution in 1917. One of the largest empires in world history, stretching over three continents, the Russian Empire was surpassed in landmass only by the British and Mongol empires. The rise of the Russian Empire happened in association with the decline of neighboring rival powers: the Swedish Empire, the PolishLithuanian Commonwealth, Persia and the Ottoman Empire. It played a major role in 181214 in defeating Napoleon's ambitions to control Europe, and expanded to the west and south., Ilya Muromets, or Ilya of Murom, sometimes Ilya Murometz, is a folk hero of Kievan Rus', a "bogatyr" (akin to knight-errant) and a character of many "bylinas" (East Slavic medieval epic poems). In the legends he is often featured alongside fellow bogatyrs Dobrynya Nikitich and Alyosha Popovich., Igor Ivanovich Sikorsky ("Ígor' Ivánovi Sikórskij" "Ihor Ivanovych Sikorskyi"; May 25, 1889  October 26, 1972), was a Russian-American aviation pioneer in both helicopters and fixed-wing aircraft. First success came with the S-2, the second fixedwing plane of his design and construction. His fifth airplane, the S-5, won him national recognition as well as F.A.I. license Number 64. His S-6-A received the highest award at the 1912 Moscow Aviation Exhibition. and in the fall of that year the aircraft won for its young designer, builder and pilot first prize in the military competition at Petrograd., Subject: boris stechkin, Relation: place_of_death, Options: (A) 1895 (B) alexander (C) alliance (D) central (E) germany (F) gotha (G) imperial (H) liberal (I) mobile (J) moscow (K) most (L) murom (M) napoleon (N) pioneer (O) russia (P) russian empire (Q) sea (R) vladimir (S) wing
Output: moscow