Question: What is the name of the castle in Jiří Kejval's city of birth?

full_context: Document 1: Clam-Gallas Palace: The Clam-Gallas Palace () is a Baroque palace in Prague, the capital of the Czech Republic. The building is situated on the corner of Husova Street and Mariánské Square, in Prague Old Town. The palace was first designed by the imperial court architect Johann Bernhard Fischer von Erlach, from Vienna. It was built in 1714–18 by the Italian architect Domenico Canevale. During the rest of the 18th century, Jewish balls and concerts were held in the palace, and were attended by noteworthy artists including Mozart and Beethoven.
Document 2: Jiří Kejval: Jiří Kejval (born 30 November 1967 in Prague) is an entrepreneur, President of the Czech Olympic Committee, member of IOC and former international rower.
Document 3: Vyšehrad: Vyšehrad (Czech for "upper castle") is a historic fort located in the city of Prague, Czech Republic, just over 3 km southeast of Prague Castle, on the right bank of the Vltava River. It was built probably in the 10th century. Situated within the fort is the Basilica of St. Peter and St. Paul, as well as the Vyšehrad Cemetery, containing the remains of many famous people from Czech history, among them Antonín Dvořák, Bedřich Smetana, Karel Čapek, and Alphonse Mucha. It also contains Prague's oldest Rotunda of St. Martin from the 11th century.
Document 4: Praha Masarykovo nádraží: It was the first railway station in the city to serve steam trains, and the second oldest railway station in Prague, Czech Republic (the first is Praha-Dejvice, formerly Bruska on the Lány Horse-drawn Railway). The station was designed by Antonín Jüngling and came into service in 1845.
Document 5: Embassy of France, Prague: The Embassy of France to the Czech Republic is located on Velkopřevorské náměstí, in Malá Strana, Prague, next to Vltava's island Kampa. It occupies the large baroque Buquoy Palace (1719). The ground floor of the Embassy was flooded during the August 2002 floods.
Document 6: Andraž Vehovar: He won a silver medal in the K1 event at the 1996 Summer Olympics in Atlanta. Vehovar's efforts earned him the Slovenian Sportsman of the year award in 1996.
Document 7: Jiří Jebavý: Jiří Jebavý is a Czech professional ice hockey defenceman who currently plays for HC Slavia Praha of the Czech Extraliga.
Document 8: Jiří Havlis: Jiří Havlis (16 November 1932 – 31 January 2010) was a Czech rower who competed for Czechoslovakia in the 1952 Summer Olympics.
Document 9: Miloš Zeman: Miloš Zeman (; born 28 September 1944) is a Czech politician serving as the third and current President of the Czech Republic since 8 March 2013. He previously served as Prime Minister of the Czech Republic from 1998 to 2002. As Leader of the Czech Social Democratic Party during the 1990s, he transformed his party into one of the country's major political forces. Zeman was Speaker of the Chamber of Deputies, the lower house of the Czech parliament, from 1996 until he became Prime Minister two years later in 1998.
Document 10: Prague Castle: Prague Castle General information Architectural style Baroque and Mannerism Location 119 08 Prague 1, Czech Republic Current tenants Miloš Zeman, President of the Czech Republic and the First Lady Construction started 870; 1148 years ago (870) Completed 1929; 89 years ago (1929) Design and construction Architect Matthias of Arras and Peter Parler Website www.hrad.cz
Document 11: Cubism: The leading Cubist architects were Pavel Janák, Josef Gočár, Vlastislav Hofman, Emil Králíček and Josef Chochol. They worked mostly in Prague but also in other Bohemian towns. The best-known Cubist building is the House of the Black Madonna in the Old Town of Prague built in 1912 by Josef Gočár with the only Cubist café in the world, Grand Café Orient. Vlastislav Hofman built the entrance pavilions of Ďáblice Cemetery in 1912–1914, Josef Chochol designed several residential houses under Vyšehrad. A Cubist streetlamp has also been preserved near the Wenceslas Square, designed by Emil Králíček in 1912, who also built the Diamond House in the New Town of Prague around 1913.
Document 12: Jiří Svoboda (volleyball): Jiří Svoboda (born April 19, 1941) is a Czech former volleyball player who competed for Czechoslovakia in the 1968 Summer Olympics.
Document 13: President of the International Olympic Committee: President of the International Olympic Committee Président du Comité international olympique Olympic rings Incumbent Thomas Bach since 10 September 2013 International Olympic Committee Style His Excellency Member of IOC Executive Board Residence Lausanne Palace Seat IOC Headquarters, Lausanne, Switzerland Appointer IOC Session Elected by the IOC Members by secret ballot Term length Eight years Renewable once for four years Constituting instrument Olympic Charter Formation 1894 First holder Demetrius Vikelas Website International Olympic Committee
Document 14: Valeriy Sushkevych: Valeriy Sushkevych (born 14 June 1954, in Tarashcha, Kiev Oblast) is a Ukrainian politician and public figure. Member of Verhovna Rada. President of the National Committee of Sports for the Disabled of Ukraine (National Paralympic Committee of Ukraine), head of the Ukrainian public socio-political association "National Assembly of Disabled of Ukraine", president of the Association "Sports Industry of Ukraine."
Document 15: President of the Czech Republic: President of the Czech Republic Prezident České republiky Presidential Standard Incumbent Miloš Zeman since 8 March 2013 Style His Excellency Residence Prague Castle Seat Prague, Czech Republic Appointer Popular vote Term length Five years Renewable once, consecutively Inaugural holder Václav Havel 2 February 1993 Formation Constitution of the Czech Republic Salary 2,235,600 Kč ($86,830) Website www.hrad.cz
ground_truth: Prague Castle
sub_queries: What is Jiří Kejval's birthplace? Answer: Prague
what is the name of the castle in Prague Answer: Prague Castle