In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Q: Passage: Bach is believed to have written Christ lag in Todes Banden in 1707. He was a professional organist aged 22, employed from 1703 in Arnstadt as the organist of the New Church (which replaced the burned Bonifatiuskirche, today known as the Bach Church). At age 18, he had inspected the new organ built by Johann Friedrich Wender, was invited to play one Sunday, and was hired. The organ was built on the third tier of a theatre-like church. Bach's duties as a church musician involved some responsibility for choral music, but the exact year he began composing cantatas is unknown. Christ lag in Todes Banden is one of a small group of cantatas that survive from his early years. According to the musicologist Martin Geck, many details of the score reflect "organistic practice".In Arnstadt, the Kantor (church musician) Heindorff was responsible for church music in the Upper Church (Liebfrauenkirche), and the New Church where Bach was the organist. He typically conducted music in the Upper Church and would appoint a choir prefect for vocal music in the New Church. Wolff notes that "subjecting his works to the questionable leadership of a prefect" was not what Bach would have done. Therefore, most cantatas of the period are not for Sunday occasions, but restricted to special occasions such as weddings and funerals. Christ lag in Todes Banden is the only exception, but was most likely composed not for Arnstadt but for an application to a more important post at the Divi Blasii church in Mühlhausen.

A: What was the name of the Bach Church when Bach was the organist?
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Q: Passage: Following the end of the Second World War, the East German side of the border was guarded initially by the Border Troops (Pogranichnyie Voiska) of the Soviet NKVD (later the KGB). They were supplemented from 1946 by a locally recruited paramilitary force, the German Border Police (Deutsche Grenzpolizei or DGP), before the Soviets handed over full control of the border to the East Germans in 1955/56. In 1961, the DGP was converted into a military force within the National People's Army (Nationale Volksarmee, NVA). The newly renamed Border Troops of the GDR (Grenztruppen der DDR, commonly nicknamed the Grenzer) came under the NVA's Border Command or Grenzkommando. They were responsible for securing and defending the borders with West Germany, Czechoslovakia, Poland, the Baltic Sea and West Berlin. At their peak, the Grenztruppen had up to 50,000 personnel.Around half of the Grenztruppen were conscripts, a lower proportion than in other branches of the East German armed forces. Many potential recruits were screened out as potentially unreliable; for instance, actively religious individuals or those with close relatives in West Germany. They were all subjected to close scrutiny to assure their political reliability and were given intensive ideological indoctrination.A special unit of the Stasi secret police worked covertly within the Grenztruppen, posing as regular border guards, between 1968 and 1985, to weed out potential defectors. One in ten officers and one in thirty enlisted men were said to have been recruited by the Stasi as informers. The Stasi regularly interviewed and maintained files on every guard. Stasi operatives were directly responsible for some aspects of security; passport control stations at crossings were manned by Stasi officers wearing Grenztruppen uniforms.The Grenztruppen were closely watched to ensure that they could not take advantage of their inside knowledge to escape across the border. Patrols, watchtowers and observation posts were always manned by two or three guards at a time. They were not allowed to go out of each other's sight in any circumstances. If a guard attempted to escape, his colleagues were under instructions to shoot him without hesitation or prior warning; 2,500 did escape to the West, 5,500 more were caught and imprisoned for up to five years, and a number were shot and killed or injured in the attempt.
The work of the guards involved carrying out repair work on the defences, monitoring the zone from watchtowers and bunkers and patrolling the line several times a day. Border Reconnaissance (Grenzaufklärungszug or GAK) soldiers, an elite reconnaissance force, carried out patrols and intelligence-gathering on the western side of the fence. Western visitors to the border were routinely photographed by the GAKs, who also oversaw work detachments maintaining the fence. The workers would be covered by machine guns to discourage them from attempting to escape.

A: What is the nickname of the group that screened out many potential recruits?
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Q: Passage: In the early 1890s, Hungarian officials announced plans for a Budapest Millennium Exhibition to be held in 1896; it was intended to mark the 1,000th anniversary of the Hungarian conquest of the Carpathian Basin, reaffirm Hungary's "national and territorial legitimacy" and the Hungarian people's "natural and historical right in the areas they inhabited." The Exhibition was to be held at Budapest's City Park. Exhibits were to be divided into twelve distinct areas, one of which was visual art. The showpiece of the art exhibit was The Conquest of the Carpathian Basin, a painting by Hungary's foremost history painter, Mihály Munkácsy, that was located in the Hungarian Parliament Building. Several pavilions displaying the cultural and industrial achievements of non-Hungarians living in the Hungarian-administered territories of Austria-Hungary were also built, including one for the Serbs.In the spring of 1895, on the orders of the Patriarch of Karlovci, Georgije I, the Congress Board of Sremski Karlovci commissioned the young realist Paja Jovanović to paint Migration of the Serbs, intending for it to be displayed as part of the Serb pavilion. Georgije had originally approached the artist Uroš Predić, but Predić said it would take him two years to complete the painting. Jovanović assured the Patriarch that he could finish the work in eight months. The painting was one of two works that Jovanović was hired to paint for the Exhibition, the other being the Vršac triptych, which was commissioned by the Vršac city council.In the eyes of the clergy, Migration of the Serbs would help legitimize Serb claims to religious autonomy and partial self-administration in Austria-Hungary. The official Church narrative held that Leopold had requested that the Serbs of Kosovo, Macedonia and the Sandžak settle along the Ottoman–Habsburg frontier to create a buffer against further Ottoman encroachment, and Church officials intended for Jovanović's painting to reflect this view. Hence, the painting had significant political implications. Habsburg Serbs asserted that the agreement between Arsenije and Leopold legitimized their claim to the lands they inhabited. Croatian nationalists decried the Serbs as "uninvited guests" who only acquired Leopold's pledge of autonomy after they had migrated to the Habsburg lands. Migration of the Serbs was thus intended to challenge the historical and political narratives being forwarded by the Croatian and Hungarian painters whose works were also going to be displayed.

A:
What was the full name of the person who said it would take him two years to complete the painting?
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