Question: Robert Johann Maria König was born in a city approximately 30 km south of what?

full_context: Document 1: Ostrava: Ostrava (Polish: "Ostrawa" , German: "Ostrau" or "Mährisch Ostrau") is a city in the north-east of the Czech Republic and is the capital of the Moravian-Silesian Region. It is 15 km from the border with Poland, at the meeting point of four rivers: the Odra, Opava, Ostravice and Lučina. In terms of both population and area Ostrava is the third largest city in the Czech Republic, the second largest city in Moravia, and the largest city in Czech Silesia; it straddles the border of the two historic provinces of Moravia and Silesia. The population was around 300,000 in 2013. The wider conurbation – which also includes the towns of Bohumín, Doubrava, Havířov, Karviná, Orlová, Petřvald and Rychvald – is home to around 500,000 people, making it the largest urban area in the Czech Republic apart from the capital, Prague.
Document 2: Salzburg: Salzburg (] ; Bavarian: "Såizburg" ; literally: "Salt Fortress") is the fourth-largest city in Austria and the capital of the federal state of Salzburg.
Document 3: Geography of Bratislava: Bratislava, the capital city of Slovakia, is situated in Central Europe and it is located in the extreme south-west within Slovakia. The city borders Austria in the west and Hungary in the south making it the only national capital in the world to border two foreign countries. State border with the Czech Republic is only 62 kilometres (38.5 mi) distant. Bratislava lies on the foothills of the Little Carpathians mountains and the city straddles both banks of the Danube River. The city has a total area of 367.58 square kilometres (141.9 mi²), making it the second largest city in Slovakia by area (after the township of Vysoké Tatry). Geomorphologically the city covers the southern tip of the Záhorie Lowland, the entire range of the Devín Carpathians, small westernmost part of the Pezinok Carpahians and the northern tip of the Danubian Lowland.
Document 4: Linz: Linz ( ; ] ; Czech: "Linec" ) is the third-largest city of Austria and capital of the state of Upper Austria (German: "Oberösterreich" ). It is in the north centre of Austria, approximately 30 km south of the Czech border, on both sides of the River Danube. The population of the city is , and that of the Greater Linz conurbation is about 271,000.
Document 5: Kurt Gödel: Kurt Friedrich Gödel ( , ; ] ; April 28, 1906 – January 14, 1978) was an Austrian, and later American, logician, mathematician, and philosopher. Considered along with Aristotle, Alfred Tarski and Gottlob Frege to be one of the most significant logicians in history, Gödel made an immense impact upon scientific and philosophical thinking in the 20th century, a time when others such as Bertrand Russell, Alfred North Whitehead, and David Hilbert were analyzing the use of logic and set theory to understand the foundations of mathematics pioneered by Georg Cantor.
Document 6: Ralf König: Ralf König (born 8 August 1960) is one of the best known and most commercially successful German comic book creators. His books have been translated into many languages. He has resided in Soest, Dortmund and Berlin and now lives in Cologne.
Document 7: Hermann Minkowski: Hermann Minkowski ( ; ] ; 22 June 1864 – 12 January 1909) was a mathematician and professor at Königsberg, Zürich and Göttingen. He created and developed the geometry of numbers and used geometrical methods to solve problems in number theory, mathematical physics, and the theory of relativity.
Document 8: Franz Alexander: Franz Gabriel Alexander, in Hungarian "Alexander Ferenc Gábor", was born in Budapest in 1891, his father was Bernhard Alexander, a philosopher and literary critic, his nephew was Alfréd Rényi, a Hungarian mathematician who made contributions in combinatorics, graph theory, number theory but mostly in probability theory. Alexander studied in Berlin; there he was part of an influential group of German analysts mentored by Karl Abraham, including Karen Horney and Helene Deutsch, and gathered around the Berlin Psychoanalytic Institute. 'In the early 1920s, Oliver Freud was in analysis with Franz Alexander' there — Sigmund Freud's son — while 'Charles Odier, one of the first among French psychoanalysts, was analysed in Berlin by Franz Alexander' as well.
Document 9: Andrey Kolmogorov: Andrey Nikolaevich Kolmogorov (Russian: Андрей Николаевич Колмогоров ; ] , 25 April 1903 – 20 October 1987) was a 20th-century Soviet mathematician who made significant contributions to the mathematics of probability theory, topology, intuitionistic logic, turbulence, classical mechanics, algorithmic information theory and computational complexity.
Document 10: Robert König: Robert Johann Maria König (11 April 1885, Linz – 9 July 1979, Munich) was an Austrian mathematician.
Document 11: Willi Rinow: Willi Ludwig August Rinow (February 28th, 1907 in Berlin – March 29th, 1979 in Greifswald) was a German mathematician who specialized in differential geometry and topology. Rinow was the son of a schoolteacher. In 1926, he attended the Humboldt University of Berlin, studying mathematics and physics under professors such as Max Planck, Ludwig Bieberbach, and Heinz Hopf. There, he received his doctorate in 1931 ("Über Zusammenhänge zwischen der Differentialgeometrie im Großen und im Kleinen", Math. Zeitschrift volume 35, 1932, page 512). In 1933, he worked at the Jahrbuch über die Fortschritte der Mathematik in Berlin. In 1937, he joined the Nazi Party. During 1937—1940, he was an editor of the journal Deutsche Mathematik. In 1937, he became a professor in Berlin and lectured there until 1950. His lecturing was interrupted because of his work as a mathematician at the Oberspreewerk in Berlin (a producer of radio and telecommunications technology) from 1946 to 1949.
Document 12: Wels: Wels (] ) is a city in Upper Austria, on the Traun River near Linz. It is the county seat of Wels-Land.
Document 13: Styria: Styria (German: Steiermark , ] , Slovene/Croatian: "Štajerska" , Hungarian: "Stájerország" , ) 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 16401 km2 . 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.
Document 14: Lienz: Lienz (] ) is a medieval town in the Austrian state of Tyrol. It is the administrative centre of the Lienz district, which covers all of East Tyrol. The municipality also includes the cadastral subdivision of "Patriasdorf".
Document 15: Probability axioms: In Kolmogorov's probability theory, the probability "P" of some event "E", denoted formula_1, is usually defined such that "P" satisfies the Kolmogorov axioms, named after the Russian mathematician Andrey Kolmogorov, which are described below.
ground_truth: Czech border