Answer the following question: Information:  - The Napier Lion was a 12-cylinder 'broad arrow' W12 configuration aircraft engine built by D. Napier & Son from 1917 until the 1930s. A number of advanced features made it the most powerful engine of its day and kept it in production long after other contemporary designs had been superseded. It is particularly well known for its use on a number of racing designs, in aircraft, boats and cars.  - A piston is a component of reciprocating engines, reciprocating pumps, gas compressors and pneumatic cylinders, among other similar mechanisms. It is the moving component that is contained by a cylinder and is made gas-tight by piston rings. In an engine, its purpose is to transfer force from expanding gas in the cylinder to the crankshaft via a piston rod and/or connecting rod. In a pump, the function is reversed and force is transferred from the crankshaft to the piston for the purpose of compressing or ejecting the fluid in the cylinder. In some engines, the piston also acts as a valve by covering and uncovering ports in the cylinder wall. The petrol enters inside the cylinder and the piston moves upwards and the spark plug produces spark and the petrol is set on fire and it produces an energy that pushes the piston downwards.  - Wolfsburg is the fifth largest city in the German state of Lower Saxony. Located on the River Aller northeast of Braunschweig ("Brunswick"), it lies about east of Hanover and west of Berlin.  - The Fortune Global 500, also known as Global 500, is an annual ranking of the top 500 corporations worldwide as measured by revenue. The list is compiled and published annually by "Fortune" magazine.  - Volkswagen Group, or Volkswagen Aktiengesellschaft, shortly VW AG, is a German multinational automotive manufacturing company headquartered in Wolfsburg, Lower Saxony, Germany. It designs, manufactures and distributes passenger and commercial vehicles, motorcycles, engines, and turbomachinery and offers related services including financing, leasing and fleet management. In 2016, it was the largest automaker in the world with sales 10.3 million units. It has maintained the largest market share in Europe for over two decades. It ranked seventh in the 2016 Fortune Global 500 list of the world's largest companies.  - An aircraft engine is the component of the propulsion system for an aircraft that generates mechanical power. Aircraft engines are almost always either lightweight piston engines or gas turbines, except for small multicopter UAVs which are almost always electric aircraft.  - A commercial vehicle is any type of motor vehicle used for transporting goods or paid passengers. The European Union defines a "commercial motor vehicle" as any motorised road vehicle, that by its type of construction and equipment is designed for, and capable of transporting, whether for payment or not: (1) more than nine persons, including the driver; (2) goods and "standard fuel tanks". This means the tanks permanently fixed by the manufacturer to all motor vehicles of the same type as the vehicle in question and whose permanent fitting lets fuel be used directly, both for propulsion and, where appropriate, to power a refrigeration system. Gas tanks fitted to motor vehicles for the direct use of diesel as a fuel are considered standard fuel tanks.  - Reciprocating motion, also called reciprocation, is a repetitive up-and-down or back-and-forth linear motion. It is found in a wide range of mechanisms, including reciprocating engines and pumps. The two opposite motions that comprise a single reciprocation cycle are called strokes.   - A W12 engine is a twelve cylinder piston internal combustion engine in a W configuration . W12 engines have been manufactured in two distinct configurations . The original W12 configuration used three banks of four cylinders coupled to a common crankshaft , with 60 ° angles between the banks . These were used in several aircraft engine designs from the 1920s , notably the Napier Lion and various French engines . The more recent configuration , used in the Volkswagen Group W12 , uses four rows of three cylinders merged into two ' cylinder banks ' ( two narrow - angle VR6 engine blocks ) , coupled to a common crankshaft .  - Volkswagen's VR6 engines, and the later VR5 variants, are a family of internal combustion engines, characterised by a narrow-angle (10.5° or 15°) V engine configuration. Developed by the manufacturer in the late 1980s, evolutions of these engines are still produced by them.  - In a reciprocating engine, the crankpins, also known as crank journals are the journals of the big end bearings, at the ends of the connecting rods opposite to the pistons.  - Aktiengesellschaft (abbreviated AG ) is a German word for a corporation limited by share ownership (i.e. is owned by its shareholders) and may be traded on a stock market. The term is used in Germany, Austria, Switzerland, South Tyrol and for companies incorporated in the German-speaking region of Belgium. It is also used in Luxembourg, though the French-language equivalent, "Société Anonyme", is more common.  - Volkswagen (- ; shortened to VW) is a German automaker founded on 4 January 1937 by the German Labour Front, headquartered in Wolfsburg, Germany. It is the flagship marque of the Volkswagen Group and is the largest automaker worldwide currently.  - In a reciprocating piston engine, the connecting rod or conrod connects the piston to the crank or crankshaft. Together with the crank, they form a simple mechanism that converts reciprocating motion into rotating motion.  - Lower Saxony is a German state ("Bundesland") situated in northwestern Germany and is second in area, with , and fourth in population (8 million) among the sixteen "Länder" of Germany. In rural areas Northern Low Saxon, a dialect of Low German, and Saterland Frisian, a variety of Frisian, are still spoken, but the number of speakers is declining.  - A crankshaftrelated to "crank"is a mechanical part able to perform a conversion between reciprocating motion and rotational motion. In a reciprocating engine, it translates reciprocating motion of the piston into rotational motion; whereas in a reciprocating compressor, it converts the rotational motion into reciprocating motion. In order to do the conversion between two motions, the crankshaft has "crank throws" or "crankpins", additional bearing surfaces whose axis is offset from that of the crank, to which the "big ends" of the connecting rods from each cylinder attach.  - Germany, officially the Federal Republic of Germany, is a federal parliamentary republic in central-western Europe. It includes 16 constituent states, covers an area of , and has a largely temperate seasonal climate. With about 82 million inhabitants, Germany is the most populous member state of the European Union. After the United States, it is the second most popular immigration destination in the world. Germany's capital and largest metropolis is Berlin. Other major cities include Hamburg, Munich, Cologne, Frankfurt, Stuttgart and Düsseldorf.  - A reciprocating engine, also often known as a piston engine, is a heat engine (usually, although there are also pneumatic and hydraulic reciprocating engines) that uses one or more reciprocating pistons to convert pressure into a rotating motion. This article describes the common features of all types. The main types are: the internal combustion engine, used extensively in motor vehicles; the steam engine, the mainstay of the Industrial Revolution; and the niche application Stirling engine. Internal Combustion engines are further classified in two ways: either a spark-ignition (SI) engine, where the spark plug initiates the combustion; or a compression-ignition (CI) engine, where the air within the cylinder is compressed, thus heating it, so that the heated air ignites fuel that is injected then or earlier.    Given the information above, choose from the list below the object entity that exhibits the relation 'instance of' with the subject 'w12 engine'.  Choices: - 1  - 12  - 1937  - aircraft engine  - aktiengesellschaft  - angle  - application  - bearing  - city  - climate  - combustion  - combustion engine  - company  - component  - construction  - corporation  - dialect  - electric aircraft  - energy  - engine  - engine configuration  - equipment  - family  - federal republic  - flagship  - fleet  - fluid  - force  - gas  - group  - industrial revolution  - january  - language  - limited  - lion  - list  - magazine  - manufacturing  - may  - member  - motion  - nine  - part  - payment  - population  - pump  - racing  - range  - ranking  - reciprocating engine  - region  - republic  - revolution  - road  - share  - single  - standard  - state  - system  - term  - two  - vehicle
Answer:
engine configuration