Question: What was the population in 2017 of the city Hans List was born in?
Context: This is a list of the 50 largest cities in the Americas by population residing within city limits as of 2015, the most recent year for which official population census results, estimates or short-term projections are available for most of these cities.  These figures do not reflect the population of the urban agglomeration or metropolitan area which typically do not coincide with the administrative boundaries of the city.  For a list of the latter, see "List of metropolitan areas in the Americas by population".  These figures refer to mid-2015 populations with the following exceptions: Mobile City is a city in Rockwall County, Texas, United States on the outskirts of Rockwall.  The population was 188 at the 2010 census.  It currently has the highest population density for any city in Texas, and is the only Texas city that is on the highest population densities of American cities list.  It currently ranks 74th on the list, and has the lowest population for any city on that list.  It is tied with Poplar Hills, Kentucky as the smallest city by total area on the list. Vienna ( ; German: "Wien" , ] ) 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 1.8 million (2.6 million 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 3 million inhabitants.  In 2001, the city centre was designated a UNESCO World Heritage Site.  In July 2017 it was moved to the list of World Heritage in Danger. Graz (] ) is the capital of Styria and the second-largest city in Austria after Vienna.  On 1 January 2017, it had a population of 320,587 (of which 286,686 had principal residence status).  In 2015, the population of the Graz larger urban zone who had principal residence status stood at 613,286. This is a list of the cities worldwide that have the highest population density.  The population, population density and land area for the cities listed are based on the entire city proper, the defined boundary or border of a city or the city limits of the city.  The population density of the cities listed is based on the average number of people living per square mile or per square kilometre.  This list does not refer to the population, population density or land area of the greater metropolitan area or urban area, nor particular districts in any of the cities listed. Poplar Hills is a home rule-class city in Jefferson County, Kentucky, United States.  A part of the Louisville Metro government, it is Kentucky's only city with a majority African-American population.  The population was 396 at the 2000 census.  It currently has the highest population density for any city in Kentucky, and is the only Kentucky city that is on the highest population densities of American cities list.  It currently ranks 19th on the list, and has the second-lowest population for any city on that list.  It is tied with Mobile City, Texas as the smallest city by total area on the list. This is a list of cities in Pennsylvania, of which there are 57.  Cities may theoretically be first-class, second-class, second-class A, or third-class (of which there are 54), according to population and adoption of certain ordinances.  However, all first-class (of which there is 1), second-class (of which there is 1), and second-class A (of which there is 1) cities, as well as 24 third-class cities, have adopted Home Rule Charters, which change a city's relationship with the state so much that they are generally no longer considered to be a city under state law.  However, they are still considered cities for classification purposes.  Unlike other similar lists for Pennsylvania's towns and boroughs and townships, this list "does" include cities with Home Rule Charters, as, unlike in the previous cases, excluding them would severely limit the comprehensibility of this list.  As in those previous cases, however, it should be strongly emphasized that these are not really cities under state law, and they are therefore also listed in "List of Pennsylvania Municipalities and Counties with Home Rule Charters, Optional Charters, or Optional Plans," and are indicated below. The following are lists of the most populous fully defined incorporated settlements in Nigeria by population.  This page consists three different tables, with different kinds of settlements; a list for "defined cities", listing the population, strictly within the defined city limits, a list for "urban area" population, and another list for the population within metropolitan areas. Hans List (April 30, 1896 in Graz, capital of Austria's federal province Styria – September 10, 1996 in Graz) was a technical scientist and inventor and entrepreneur. Helmut List (born December 20, 1941, Graz) is an engineer, businessman, and philanthropist.  He holds the academic title of Professor Doctor.  He is CEO of AVL, (Anstalt für Verbrennungskraftmaschinen List, "Institute for Combustion Engines List") which was founded by his father, the engineer and inventor Hans List, in 1948.  AVL operates globally and is based in Graz, capital of Austria's province Styria.
Answer: 320,587