Answer the following question: Information: - Bezirk Murzzuschlag is a former district of the state of Styria in Austria. Murzzuschlag merged with the district of Bruck an der Mur to form the new district Bruck-Murzzuschlag on January 1, 2013. - In rail transport, track gauge is the spacing of the rails on a railway track and is measured between the inner faces of the load-bearing rails. - The standard gauge (also Stephenson gauge after George Stephenson, International gauge, or normal gauge) is a widely used railway track gauge. Approximately 55% of the lines in the world are this gauge. All high-speed rail lines (except those in Russia, Uzbekistan, and Finland) are standard gauge. The distance between the inside edges of the rails is defined to be (except in the United States, where it is still defined in Imperial and US customary units as ). It is also called the UIC gauge or UIC track gauge, the European gauge in the EU and Russia, or uniform gauge in Queensland, Australia. - The Semmering railway ( German : Semmeringbahn ) in Austria , which starts at Gloggnitz and leads over the Semmering to Murzzuschlag was the first mountain railway in Europe built with a standard gauge track . It is commonly referred to as the world 's first true mountain railway , given the very difficult terrain and the considerable altitude difference that was mastered during its construction . It is still fully functional as a part of the Southern Railway which is operated by the Austrian Federal Railways . - Gloggnitz is a mountain town in the Neunkirchen district of Lower Austria, Austria. - The Austrian Federal Railways (German: Osterreichische Bundesbahnen or OBB, formerly the Bundesbahn Osterreich or BBO) is the national railway system of Austria, and the administrator of Liechtenstein's railways. The OBB group is owned entirely by the Republic of Austria and is divided into several separate businesses that manage the infrastructure and operate passenger and freight services. - A ski resort is a resort developed for skiing, snowboarding, and other winter sports. In Europe, most ski resorts are towns or villages in or adjacent to a ski area a mountainous area with pistes, ski trails and a ski lift system. In North America, it is more common for ski areas to exist well away from towns, so ski resorts usually are destination resorts, often purpose-built and self-contained, where skiing is the main activity. - Murzzuschlag is a town in northeastern Styria, Austria, the capital of the former Murzzuschlag District. It is located on the Murz river near the Semmering Pass, the border with the state of Lower Austria, about southwest of Vienna. The population is. Originally an industrial area, the nearby mountains are today a popular ski resort. - George Stephenson (9 June 1781 12 August 1848) was an English civil engineer and mechanical engineer who built the first public inter-city railway line in the world to use steam locomotives, the Liverpool and Manchester Railway which opened in 1830. Renowned as the "Father of Railways", the Victorians considered him a great example of diligent application and thirst for improvement, with self-help advocate Samuel Smiles particularly praising his achievements. His rail gauge of , sometimes called "Stephenson gauge", is the standard gauge by name and by convention for most of the world's railways. - The Murz is a river in Austria. It begins north of the Schneealpe in Lower Austria, flows into Styria, and meets the Mur River after 98km in Bruck an der Mur. Its headwaters end at Murzzuschlag. Along its course are the tracks of the Southern Railway as well as the Semmering Highway. - Lower Austria (; ) is the northeasternmost state of the nine states in Austria. The capital of Lower Austria since 1986 is Sankt Polten, the most recently designated capital town in Austria. The capital of Lower Austria had formerly been Vienna, even though Vienna has not officially been part of Lower Austria since 1921. With a land area of and a population of 1.612 million people, it is the largest state in Austria, and in terms of population second only to the federal state of Vienna. - Styria (, Slovene/) is a state or "Bundesland", located in the southeast of Austria. In area it is the second largest of the nine Austrian federated states, covering . It borders Slovenia and the Austrian states of Upper Austria, Lower Austria, Salzburg, Burgenland, and Carinthia. The population (as of ) was . The capital city is Graz which had 276,526 inhabitants at the beginning of 2015. - Liechtenstein , officially the Principality of Liechtenstein, is a doubly landlocked German-speaking microstate in Central Europe. It is a constitutional monarchy with the rank of principality, headed by the Prince of Liechtenstein. - O, or o, is a character that represents either a letter from several extended Latin alphabets, or the letter O modified with an umlaut mark or diaeresis. In many languages, the letter o, or the O modified with what is known as an "umlaut mark", is used to denote the non-close front rounded vowels or . In languages without such vowels, the character is known as an "O with diaeresis" and denotes a syllable break, wherein its pronunciation remains an unmodified . - High-speed rail is a type of rail transport that operates significantly faster than traditional rail traffic, using an integrated system of specialized rolling stock and dedicated tracks. While there is no single standard that applies worldwide, new lines in excess of and existing lines in excess of are widely considered to be high-speed, with some extending the definition to include lower speeds in areas for which these speeds still represent significant improvements. The first such system began operations in Japan in 1964 and was widely known as the bullet train. High-speed trains normally operate on standard gauge tracks of continuously welded rail on grade-separated right-of-way that incorporates a large turning radius in its design. - "For the town of the same name, see Semmering, Austria." - Vienna is the capital and largest city of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.8million (2.6million within the metropolitan area, nearly one third of Austria's population), and its cultural, economic, and political centre. It is the 7th-largest city by population within city limits in the European Union. Until the beginning of the 20th century, it was the largest German-speaking city in the world, and before the splitting of the Austro-Hungarian Empire in World War I, the city had 2 million inhabitants. Today, it has the second largest number of German speakers after Berlin. Vienna is host to many major international organizations, including the United Nations and OPEC. The city is located in the eastern part of Austria and is close to the borders of the Czech Republic, Slovakia, and Hungary. These regions work together in a European Centrope border region. Along with nearby Bratislava, Vienna forms a metropolitan region with 3million inhabitants. In 2001, the city centre was designated a UNESCO World Heritage Site. After reading the paragraphs above, we are interested in knowing the entity with which 'semmering railway' exhibits the relationship of 'instance of'. Find the answer from the choices below. Choices: - 12 - administrator - application - area - august - bearing - berlin - bezirk - border - capital - character - city - city centre - constitutional monarchy - course - definition - distance - district - grade - hungary - infrastructure - june - letter - line - mountain - name - nine - number - people - population - principality - railway line - railway system - rank - river - rolling stock - ski resort - skiing - standard - state - syllable - system - town - track - transport - work - world heritage site - world war
Answer:
railway line