Context: Rheingau-Taunus is a Kreis (district) in the west of Hesse, Germany. Neighboring districts are Limburg-Weilburg, Hochtaunuskreis, Main-Taunus-Kreis, district-free Wiesbaden, Mainz-Bingen, Rhein-Lahn., A metropolis is a large city or conurbation which is a significant economic, political, and cultural center for a country or region, and an important hub for regional or international connections, commerce, and communications. The term is Greek and means the "mother city" of a colony (in the ancient sense), that is, the city which sent out settlers. This was later generalized to a city regarded as a center of a specified activity, or any large, important city in a nation., Bankenviertel ("banking district") is the name of the central business district in Frankfurt, Germany. It designates an area in the city centre, where many banks, insurance companies and other financial institutions are located. It is the most important financial centre in Germany and one of the largest in Europe along with La Défense in the Paris aire urbaine and London's City and Canary Wharf., The Rheingau ( literally `` Rhine District '' ) consists of the district on the Northern side of the Rhine between the German towns of Wiesbaden and Lorch near Frankfurt , reaching from the Western Taunus to the Rhine . It is situated in the German state of Hesse and is part of the Rheingau - Taunus - Kreis administrative district . It is famous for Rheingau wines , especially the `` Rheingauer Riesling , '' and its many taverns ., Main-Taunus is a Kreis (district) in the middle of Hesse, Germany and is part of the Frankfurt/Rhine-Main Metropolitan Region as well as the Frankfurt urban area. Neighboring districts are Hochtaunuskreis, district-free Frankfurt, Groß-Gerau, district-free Wiesbaden, Rheingau-Taunus. It is the second most densely populated rural district in Germany., Wiesbaden is a city in central western Germany and the capital of the federal state of Hesse. In July 2016, it had about 288,000 inhabitants, plus approximately 19,000 United States citizens (mostly associated with the United States Army). The Wiesbaden urban area is home to approx. 560,000 people., World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. It involved the vast majority of the world's nationsincluding all of the great powerseventually forming two opposing military alliances: the Allies and the Axis. It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries. In a state of "total war", the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, erasing the distinction between civilian and military resources. Marked by mass deaths of civilians, including the Holocaust (in which approximately 11 million people were killed) and the strategic bombing of industrial and population centres (in which approximately one million were killed, and which included the atomic bombings of Hiroshima and Nagasaki), it resulted in an estimated 50 million to 85 million fatalities. These made World War II the deadliest conflict in human history., Mainz-Bingen is a district ("Kreis") in the east of Rhineland-Palatinate, Germany. Neighboring districts are (from north clockwise) Rheingau-Taunus, the district-free cities Wiesbaden and Mainz, the districts Groß-Gerau, Alzey-Worms, Bad Kreuznach, Rhein-Hunsrück., Frankfurt am Main is a metropolis and the largest city in the German state of Hesse and the fifth-largest city in Germany, with a 2015 population of 731,095 within its administrative boundaries, and 2.3 million in its urban area. The city is at the centre of the larger Frankfurt Rhine-Main Metropolitan Region, which has a population of 5.8 million and is Germany's second-largest metropolitan region after Rhine-Ruhr. Since the enlargement of the European Union in 2013, the geographic centre of the EU is about to the east of Frankfurt's CBD, the Bankenviertel. Frankfurt is culturally and ethnically diverse, with around half of the population, and a majority of young people, having a migration background. A quarter of the population are foreign nationals, including many expatriates., The Netherlands  is the main constituent country of the Kingdom of the Netherlands. It is a densely populated country located in Western Europe with three island territories in the Caribbean. The European part of the Netherlands borders Germany to the east, Belgium to the south, and the North Sea to the northwest, sharing maritime borders with Belgium, the United Kingdom, and Germany. The largest cities in the Netherlands are Amsterdam, Rotterdam, The Hague and Utrecht. Amsterdam is the country's capital, while The Hague holds the Dutch seat of government and parliament. The name "Holland" is used to refer informally to the whole of the country of the Netherlands., The euro (sign: €; code: EUR) is the official currency of the eurozone, which consists of 19 of the member states of the European Union: Austria, Belgium, Cyprus, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Portugal, Slovakia, Slovenia, and Spain. The currency is also officially used by the institutions of the European Union and four other European countries, as well as unilaterally by two others, and is consequently used daily by some 337 million Europeans . Outside of Europe, a number of overseas territories of EU members also use the euro as their currency., The Taunus is a mountain range in Hesse, Germany located north of Frankfurt. The tallest peak in the range is "Großer Feldberg" at 878 m; other notable peaks are "Kleiner Feldberg" (825 m) and "Altkönig" (798 m)., Mainz is the capital and largest city of the state of Rhineland-Palatinate in Germany. It was the capital of the Electorate of Mainz at the time of the Holy Roman Empire. In antiquity Mainz was a Roman fort city which commanded the west bank of the Rhine and formed part of the northernmost frontier of the Roman Empire; it was founded as a military post by the Romans in the late 1st century BC and became the provincial capital of Germania Superior. The city is located on the river Rhine at its confluence with the Main opposite Wiesbaden, in the western part of the Frankfurt Rhine-Main; in the modern age, Frankfurt shares much of its regional importance., The Grand Duchy of Hesse and by Rhine, or the Grand Duchy of Hesse between 1806 and 1816, was an independent country and member state of the German Confederation as of 1806, when the Landgraviate of Hesse-Darmstadt was elevated to a Grand Duchy which it remained until 1918, when the monarchy was overthrown. Hesse lost its independence when it joined the German Empire in 1871. Before 1866, its northern neighbour was its former sister Landgraviate, since 1803 an Electorate, of Hesse-Kassel  for this reason, this state was sometimes colloquially known as Hesse-Darmstadt., The Alpine region of Switzerland, conventionally referred to as the Swiss Alps (, ), represents a major natural feature of the country and is, along with the Swiss Plateau and the Swiss portion of the Jura Mountains, one of its three main physiographic regions. The Swiss Alps extend over both the Western Alps and the Eastern Alps, encompassing an area sometimes called "Central Alps". While the northern ranges from the Bernese Alps to the Appenzell Alps are entirely in Switzerland, the southern ranges from the Mont Blanc massif to the Bernina massif are shared with other countries such as France, Italy, Austria and Liechtenstein., 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., Rhineland-Palatinate (German: "Rheinland-Pfalz") is one of the 16 states (German: "Länder", lit. "countries" however better translated as "state") of the Federal Republic of Germany. It has an area of and about four million inhabitants. Its state capital is Mainz. Rhineland-Palatinate is located in western Germany and borders Belgium, Luxembourg and France, and the German states of North Rhine-Westphalia, Hesse, Baden-Württemberg and Saarland., The European Union (EU) is a political and economic union of member states that are located primarily in Europe. It has an area of , and an estimated population of over 510 million. The EU has developed an internal single market through a standardised system of laws that apply in all member states. EU policies aim to ensure the free movement of people, goods, services, and capital within the internal market, enact legislation in justice and home affairs, and maintain common policies on trade, agriculture, fisheries, and regional development. Within the Schengen Area, passport controls have been abolished. A monetary union was established in 1999 and came into full force in 2002, and is composed of 19 EU member states which use the euro currency., The Rhine (, , ) is a European river that begins in the Swiss canton of Graubünden in the southeastern Swiss Alps, forms part of the 
Swiss-Austrian, Swiss-Liechtenstein, Swiss-German and then the Franco-German border, then flows through the Rhineland and eventually empties into the North Sea in the Netherlands. 
The largest city on the river Rhine is Cologne, Germany, with a population of more than 1,050,000 people. It is the second-longest river in Central and Western Europe (after the Danube), at about , with an average discharge of about ., The Rhine-Ruhr metropolitan region is the largest metropolitan region in Germany with over 11 million inhabitants. It is of polycentric nature and the only megacity in Germany. It covers an area of 7,110 square kilometers and lies entirely within the federal state of North Rhine-Westphalia. The Rhine-Ruhr metropolitan region spreads from Dortmund-Bochum-Essen-Duisburg (Ruhr Area) in the north, to the urban areas of the cities of Mönchengladbach, Düsseldorf (the state capital), Wuppertal, Leverkusen, Cologne (the region's largest and Germany's fourth largest city), and Bonn in the south. The location of the Rhine-Ruhr at the heart of the European blue banana makes it well connected to other major European cities and metropolitan areas like the Randstad, the Flemish Diamond and the Frankfurt Rhine Main Region., Hesse or Hessia (, Hessian dialect: "Hesse" ) is a federal state ("Land") of the Federal Republic of Germany, with just over six million inhabitants. The state capital is Wiesbaden; the largest city is Frankfurt am Main. Until the formation of the German Reich in 1871, Hesse was an independent country ruled by a Grand Duke (Grand Duchy of Hesse). Due to divisions after World War II, the modern federal state does not cover the entire cultural region of Hesse which includes both the State of Hesse and the area known as Rhenish Hesse (Rheinhessen) in the neighbouring state of Rhineland-Palatinate., The Alps are the highest and most extensive mountain range system that lies entirely in Europe, stretching approximately across eight Alpine countries: Austria, France, Germany, Italy, Liechtenstein, Monaco, Slovenia, and Switzerland. The mountains were formed over tens of millions of years as the African and Eurasian tectonic plates collided. Extreme shortening caused by the event resulted in marine sedimentary rocks rising by thrusting and folding into high mountain peaks such as Mont Blanc and the Matterhorn. Mont Blanc spans the FrenchItalian border, and at is the highest mountain in the Alps. The Alpine region area contains about a hundred peaks higher than 4000 metres (just over 13,000 feet)., Cologne is the largest city in the German federal State of North Rhine-Westphalia and the fourth-largest city in Germany (after Berlin, Hamburg, and Munich). It is located within the Rhine-Ruhr metropolitan region, one of the major European metropolitan regions and the largest in Germany, with more than ten million inhabitants., The Hochtaunuskreis is a "Kreis" (district) in the middle of Hesse, Germany and is part of the Frankfurt/Rhine-Main Metropolitan Region. Neighbouring districts are Lahn-Dill, Wetteraukreis, district-free Frankfurt, Main-Taunus, Rheingau-Taunus, Limburg-Weilburg.
The Hochtaunuskreis and the Landkreis Starnberg regularly compete for the title of the wealthiest district in Germany., Riesling is a white grape variety which originated in the Rhine region of Germany. Riesling is an aromatic grape variety displaying flowery, almost perfumed, aromas as well as high acidity. It is used to make dry, semi-sweet, sweet, and sparkling white wines. Riesling wines are usually varietally pure and are seldom oaked. As of 2004, Riesling was estimated to be the world's 20th most grown variety at (with an increasing trend), but in terms of importance for quality wines, it is usually included in the "top three" white wine varieties together with Chardonnay and Sauvignon blanc. Riesling is a variety which is highly ""terroir"-expressive", meaning that the character of Riesling wines is greatly influenced by the wine's place of origin., Subject: rheingau, Relation: capital, Options: (A) amsterdam (B) appenzell (C) bad kreuznach (D) berlin (E) city (F) cologne (G) darmstadt (H) dortmund (I) eu (J) frankfurt (K) hamburg (L) hiroshima (M) luxembourg (N) mainz (O) most (P) paris (Q) stuttgart (R) wiesbaden (S) worms
Output: bad kreuznach