Answer the following question: Information: - Bolton (or locally ) is a town in Greater Manchester in North West England. A former mill town, Bolton has been a production centre for textiles since Flemish weavers settled in the area in the 14th century, introducing a wool and cotton-weaving tradition. The urbanisation and development of the town largely coincided with the introduction of textile manufacture during the Industrial Revolution. Bolton was a 19th-century boomtown, and at its zenith in 1929 its 216cotton mills and 26bleaching and dyeing works made it one of the largest and most productive centres of cotton spinning in the world. The British cotton industry declined sharply after the First World War, and by the 1980s cotton manufacture had virtually ceased in Bolton. - Groundwater (or ground water) is the water present beneath Earth's surface in soil pore spaces and in the fractures of rock formations. A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water. The depth at which soil pore spaces or fractures and voids in rock become completely saturated with water is called the water table. Groundwater is recharged from, and eventually flows to, the surface naturally; natural discharge often occurs at springs and seeps, and can form oases or wetlands. Groundwater is also often withdrawn for agricultural, municipal, and industrial use by constructing and operating extraction wells. The study of the distribution and movement of groundwater is hydrogeology, also called groundwater hydrology. - Wigan is a town in Greater Manchester, England. It stands on the River Douglas, south-west of Bolton, north of Warrington and west-northwest of Manchester. Wigan is the largest settlement in the Metropolitan Borough of Wigan and is its administrative centre. The town of Wigan had a total population of 97,000 in 2011, whilst the wider borough has a population of 318,100. - Leeds is a city in West Yorkshire, England. Historically in Yorkshire's West Riding, the history of Leeds can be traced to the 5th century when the name referred to a wooded area of the Kingdom of Elmet. The name has been applied to many administrative entities over the centuries. It changed from being the appellation of a small manorial borough in the 13th century, through several incarnations, to being the name attached to the present metropolitan borough. In the 17th and 18th centuries Leeds became a major centre for the production and trading of wool. - Manchester is a major city and metropolitan borough in Greater Manchester, England, with a population of 514,414 . It lies within the United Kingdom's second-most populous urban area, with a population of 2.55 million. Manchester is fringed by the Cheshire Plain to the south, the Pennines to the north and east and an arc of towns with which it forms a continuous conurbation. The local authority is Manchester City Council. - A fantail is a small windmill mounted at right angles to the sails , at the rear of the windmill , and which turns the cap automatically to bring it into the wind . The fantail was patented in 1745 by Edmund Lee , a blacksmith working at Brockmill Forge near Wigan , England , and perfected on mills around Leeds and Hull towards the end of the 18th century . Fantails are found on all types of traditional windmills . They are more common in England , Denmark and Germany than in other parts of Europe , and are little - known on windmills elsewhere except where English millwrighting traditions were in evidence . The rotating fantail turns the cap of the windmill via a system of gearing to a toothed rack around the top of the mill tower , or to wheels running on the ground in the case of a post mill. It does so until the fantail sails are oriented parallel to the wind , as in this case the wind can no longer move them . When the fantail is oriented parallel to the wind , the main sails are in the optimal perpendicular orientation and produce maximum power . - Rotational energy or angular kinetic energy is kinetic energy due to the rotation of an object and is part of its total kinetic energy. Looking at rotational energy separately around an object's axis of rotation, the following dependence on the object's moment of inertia is observed: - A windpump is a type of windmill which is used for pumping water. Windpumps were used to pump water since at least the 9th century in what is now Afghanistan, Iran and Pakistan. The use of wind pumps became widespread across the Muslim world and later spread to China and India. Windmills were later used extensively in Europe, particularly in the Netherlands and the East Anglia area of Great Britain, from the late Middle Ages onwards, to drain land for agricultural or building purposes. - Greater Manchester is a metropolitan county in North West England, with a population of 2.8million. It encompasses one of the largest metropolitan areas in the United Kingdom and comprises ten metropolitan boroughs: Bolton, Bury, Oldham, Rochdale, Stockport, Tameside, Trafford, Wigan, and the cities of Manchester and Salford. Greater Manchester was created on 1 April 1974 as a result of the Local Government Act 1972; and designated a City Region on 1 April 2011. - A windmill is a mill that converts the energy of wind into rotational energy by means of vanes called sails or blades. Centuries ago, windmills usually were used to mill grain, pump water, or both. Thus they often were gristmills, windpumps, or both. The majority of modern windmills take the form of wind turbines used to generate electricity, or windpumps used to pump water, either for land drainage or to extract groundwater. - The Metropolitan Borough of Wigan is a metropolitan borough of Greater Manchester, in North West England. It is named after its largest component town and former county borough, Wigan and includes the towns and villages of Leigh, part of Ashton-in-Makerfield, Ince-in-Makerfield, Hindley, Orrell, Standish, Atherton, Tyldesley, Golborne, Lowton, Billinge, Astley, Haigh and Aspull. The borough was formed in 1974 and is an amalgamation of several former local government districts and parishes. The borough has three civil parishes and lies directly to the west of the City of Salford and southwest of the Metropolitan Borough of Bolton. The local authority is Wigan Metropolitan Borough Council. - England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west. The Irish Sea lies northwest of England and the Celtic Sea lies to the southwest. England is separated from continental Europe by the North Sea to the east and the English Channel to the south. The country covers five-eighths of the island of Great Britain (which lies in the North Atlantic) in its centre and south; and includes over 100 smaller islands such as the Isles of Scilly, and the Isle of Wight. - York is a historic walled city at the confluence of the rivers Ouse and Foss in North Yorkshire, England. The municipality is the traditional county town of Yorkshire to which it gives its name. The city has a rich heritage and has provided the backdrop to major political events in England throughout much of its two millennia of existence. The city offers a wealth of historic attractions, of which York Minster is the most prominent, and a variety of cultural and sporting activities making it a popular tourist destination for millions. - Elmet was an independent Brittonic kingdom covering a region of what later became the West Riding of Yorkshire in the Early Middle Ages, between about the 5th century and early 7th century. Although its precise borders are unclear, it appears to have been bounded by the River Sheaf in the south and the River Wharfe in the east. It adjoined Deira to the north and Mercia to the south, and its western boundary appears to have been near Craven, which was possibly a minor British kingdom. As such it was well to the east of other territories of the Britons in Wales and the West Country ("i.e." Cornwall and Dumnonia), and to the south of those in the "Hen Ogledd" ("Old North"). As one of the southeasternmost Brittonic regions for which there is reasonably substantial evidence, it is notable for having survived relatively late in the period of Anglo-Saxon settlement of Britain. - Loidis, from which Leeds derives its name, was anciently a forested area of the Celtic kingdom of Elmet. The settlement certainly existed at the time of the Norman conquest of England and in 1086 was a thriving manor under the overlordship of Ilbert de Lacy. It gained its first charter from Maurice de Gant in 1207 yet grew but slowly throughout the medieval and Tudor periods. The town had become part of the Duchy of Lancaster and reverted to the crown in the medieval period, so was a Royalist stronghold at the start of the English Civil War. - Yorkshire (or ; abbreviated Yorks), formally known as the County of York, is a historic county of Northern England and the largest in the United Kingdom. Due to its great size in comparison to other English counties, functions have been undertaken over time by its subdivisions, which have also been subject to periodic reform. Throughout these changes, Yorkshire has continued to be recognised as a geographical territory and cultural region. The name is familiar and well understood across the United Kingdom and is in common use in the media and the military, and also features in the titles of current areas of civil administration such as North Yorkshire, South Yorkshire, West Yorkshire and East Riding of Yorkshire. - Wool is the textile fiber obtained from sheep and other animals, including cashmere from goats, mohair from goats, qiviut from muskoxen, angora from rabbits, and other types of wool from camelids. - A wind turbine is a device that converts the wind's kinetic energy into electrical power. - West Yorkshire is a metropolitan county in England. It is an inland and in relative terms upland county having eastward-draining valleys while taking in moors of the Pennines and has a population of 2.2 million. West Yorkshire came into existence as a metropolitan county in 1974 after the passage of the Local Government Act 1972. What object entity has the relation of 'subclass of' with the subject 'windmill fantail'? Choices: - administrative centre - area - borough - boundary - charter - city - constructing - country - county - distribution - electricity - energy - england - english - evidence - fiber - government - history - island - local government - mill - moment - municipality - name - natural - norman - object - part - power - pump - revolution - river - rock - rotation - spread - study - subject - table - territory - textile - time - town - tradition - turbine - type - water - western - wind - windmill
Answer:
turbine