Context: Moravia  is a historical country in the Czech Republic (forming its eastern part) and one of the historical Czech lands, together with Bohemia and Czech Silesia. The medieval and early modern Margraviate of Moravia was a crown land of the Lands of the Bohemian Crown (from 1348 to 1918), an imperial state of the Holy Roman Empire (1004 to 1806), later a crown land of the Austrian Empire (1804 to 1867) and briefly also one of 17 former crown lands of the Cisleithanian part of the Austro-Hungarian Empire from 1867 to 1918. During the early 20th century, Moravia was one of the five lands of Czechoslovakia from 1918 to 1928; it was then merged with Czech Silesia, and eventually dissolved by abolition of the land system in 1949., The Lands of the Bohemian Crown, often called "Czech lands" in modern times, were a number of incorporated states in Central Europe during the medieval and early modern periods connected by feudal relations under the joint rule of the Bohemian kings. The crown lands primarily consisted of the Kingdom of Bohemia, an electorate of the Holy Roman Empire according to the Golden Bull of 1356, the Margraviate of Moravia, the Duchies of Silesia, the Lusatias, as well as other territories throughout its history., The Czech lands or the Bohemian lands, are the three historical regions of Bohemia, Moravia, and Czech Silesia, which together have formed the Czech Republic since 1 January 1993., Bohemia is the westernmost and largest historical region of the Czech lands in the present-day Czech Republic. In a broader meaning, Bohemia sometimes refers to the entire Czech territory, including Moravia and Czech Silesia, especially in a historical context, such as the Lands of the Bohemian Crown ruled by Bohemian kings., Czech Silesia  is the name given to the part of the historical region of Silesia presently located in the Czech Republic. While not today an administrative entity in itself, Czech Silesia is, together with Bohemia and Moravia, one of the three historical Czech lands. In this context, it is often mentioned as "Silesia" even though it is only around one tenth of the area of the historic land of Silesia. , Silesia (or  ; Silesian German: "Schläsing" Silesian: "lnsk" ) is a region of Central Europe located mostly in Poland, with small parts in the Czech Republic and Germany. Its area is about , and its population about 8,000,000. Silesia is located along the Oder river. It consists of Lower Silesia and Upper Silesia., Carl Ferdinand Ritter von Arlt ( April 18 , 1812 -- March 7 , 1887 ) was an Austrian ophthalmologist born in Ober - Graupen , a village near Teplitz ( Teplice ) in Bohemia . He earned his doctorate in Prague in 1839 , and later became a professor of ophthalmology in Prague ( 1849 -- 1856 ) and Vienna ( 1856 -- 1883 ) . His son Ferdinand Ritter von Arlt ( 1842 -- 1917 ) was also an ophthalmologist . Arlt published a prodiguous number of books and articles concerning diseases of the eye , and collaborated with Albrecht von Graefe and Franciscus Donders on the journal Archiv für Ophthalmologie . He was the first physician to provide proof that myopia ( short - sightedness ) is generally a consequence of excessive length of the sagittal axis of the eye ( bulbus ) . Annually . he returned to his home town in order to treat people in its vicinity who were afflicted with eye diseases . Arlt died in Vienna on 7 March 1887 . The following eponyms are named after Arlt : `` Arlt 's line '' : Linear scar present in sulcus subtarsalis during Chlamydia trachomatis infection . `` Arlt 's operation '' : Transplantation of eyelashes back from the edge of the eyelid for treatment of distichiasis . `` Arlt 's syndrome '' : A contagious eye infection caused by Chlamydia trachomatis . `` Arlt 's triangle '' : keratic precipitates distributed in a wedge - shaped area on the inferior corneal endothelium ., The Czech Republic, also known by the short name Czechia, is a nation state in Central Europe bordered by Germany to the west, Austria to the south, Slovakia to the east and Poland to the northeast. The Czech Republic covers an area of with mostly temperate continental climate and oceanic climate. It is a unitary parliamentary republic, has 10.5 million inhabitants and the capital and largest city is Prague, with over 1.2 million residents. The Czech Republic includes the historical territories of Bohemia, Moravia, and Czech Silesia., Subject: carl ferdinand von arlt, Relation: country_of_citizenship, Options: (A) austrian empire (B) bohemia (C) czech republic (D) czechoslovakia (E) germany (F) holy roman empire (G) kingdom of bohemia (H) poland
Output: austrian empire