Given the question: Information: - The de Havilland Gipsy is a British air-cooled four-cylinder in-line aircraft engine designed by Frank Halford in 1927 to replace the ADC Cirrus in the de Havilland DH.60 Moth light biplane. Initially developed as an upright 5litre (300cubic inch) capacity engine, later versions were designed to run inverted with increased capacity and power. - A turbine (from the Latin "turbo", a vortex, related to the Greek , "tyrb", meaning "turbulence") is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced by a turbine can be used for generating electrical power when combined with a generator or producing thrust, as in the case of jet engines. A turbine is a turbomachine with at least one moving part called a rotor assembly, which is a shaft or drum with blades attached. Moving fluid acts on the blades so that they move and impart rotational energy to the rotor. Early turbine examples are windmills and waterwheels. - Rolls-Royce Limited owned a British luxury-car and aero engine manufacturing business founded in 1904 by Charles Stewart Rolls and Sir Frederick Henry Royce. Rolls-Royce Limited was incorporated on 15 March 1906 as a vehicle for their ownership of their Rolls-Royce business. Their business quickly developed a reputation for superior engineering quality, "best car in the world", building on F H Royce's existing standing. Rolls-Royce became a leading manufacturer of piston aero-engines after it was brought into building them by the first World War . - The de Havilland Engine Company was an offshoot of the de Havilland aircraft building company, which started life as the 'Engine Division of the de Havilland Aircraft Company' in 1926 producing the famous de Havilland Gipsy aero-engine. The company was merged with Bristol Siddeley (BSEL) engines in 1961 with BSEL subsequently becoming part of Rolls-Royce Limited in 1968. - The General Electric T58 is an American turboshaft engine developed for helicopter use. First run in 1955, it remained in production until 1984, by which time some 6,300 units had been built. On July 1, 1959, it became the first turbine engine to gain FAA certification for civil helicopter use. The engine was license-built and further developed by de Havilland in the UK as the Gnome, and also manufactured by Alfa Romeo and the IHI Corporation. - De Havilland Aircraft Company Limited was a British aviation manufacturer established in late 1920 by Geoffrey de Havilland at Stag Lane Aerodrome Edgware on the outskirts of north London. Operations were later moved to Hatfield in Hertfordshire. - Bristol is a city, unitary authority area and county in South West England with an estimated population of 449,300 in 2016. It is England's sixth and the United Kingdom's eighth most populous city, and the most populous city in Southern England after London. The city borders the Unitary Authority areas of North Somerset and South Gloucestershire, with the historic cities of Bath and Gloucester to the south-east and north-east, respectively. - A turboshaft engine is a form of gas turbine which is optimized to produce shaft power rather than jet thrust. - Bristol Siddeley Engines Ltd (BSEL) was a British aero engine manufacturer. The company was formed in 1959 by a merger of Bristol Aero-Engines Limited and Armstrong Siddeley Motors Limited. In 1961 the company was expanded by the purchase of the de Havilland Engine Company and the engine division of Blackburn Aircraft. Bristol Siddeley was purchased by Rolls-Royce Limited in 1968. - Blackburn Aircraft Limited was a British aircraft manufacturer that concentrated mainly on naval and maritime aircraft during the first part of the 20th century. - A gas turbine, also called a combustion turbine, is a type of internal combustion engine. It has an upstream rotating compressor coupled to a downstream turbine, and a combustion chamber in between. - Alfa Romeo Automobiles S.p.A. is an Italian car manufacturer, founded as A.L.F.A. (""Anonima Lombarda Fabbrica Automobili"" (Anonymous Lombard Automobile Factory) on June 24, 1910, in Milan and involved in car racing since 1911. - The Rolls - Royce Gnome is a British turboshaft engine originally developed by the de Havilland Engine Company as a licence - built General Electric T58 , an American mid- 1950s design . The Gnome came to Rolls - Royce after their takeover of Bristol Siddeley in 1968 , Bristol having absorbed de Havilland Engines Limited in 1961 . - , formerly known as , is a Japanese company which produces ships, aircraft engines, turbochargers for automobiles, industrial machines, power station boilers and other facilities, suspension bridges and other transport-related machinery. After reading the paragraphs above, we are interested in knowing the entity with which 'rolls-royce gnome' exhibits the relationship of 'subclass of'. Find the answer from the choices below. Choices: - aerodrome - aircraft - aircraft engine - anonymous - automobile - building - case - city - combustion engine - company - corporation - county - de havilland gipsy - device - engine - engineering - england - fluid - gas - gas turbine - general - gnome - japanese - latin - license - life - light - line - ownership - part - power - power station - standing - transport - turbine - turboshaft - type - unitary authority - vehicle - war - work
The answer is:
aircraft engine