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.
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Question: Passage: Albrecht the Elder was 62 or 63  when his panel was painted early in 1490. Barbara's portrait may have been completed soon after, when she would have been around 39. Their son was around 18 and had just completed his apprenticeship with Michael Wolgemut, and would soon leave for Nuremberg to travel as a journeyman painter. The father panel was painted first; for aesthetic reasons Dürer may have waited a year or two until his mother looked older.The sitters are presented in three-quarter view before flat, nondescript lacquer-like green backgrounds, which although lushly coloured, are thinly layered. Each has a white ground and light red imprimatura with lead content. The sitter's form and pose echo and in many ways counterbalance each other. Brand Philip draws attention to the similarities of the panels' linear construction, especially the manner in which the folds and lines of their clothing form triangular shapes. The train of Barbara's headdress across her chest corresponds with the opening of Albrecht's fur-lined coat. It was more usual in pendant portraits of this type for the male to be on the left-hand side; the positioning here may be an indication that Dürer originally intended his father's panel to stand alone, given that Barbara's was painted some time later.Albrecht the Elder's panel is regarded as the superior of the two works. This may in part be attributed to differing contemporary treatments of male and female portraits; men were allowed more individuality, while female portraits were bound by stereotypes and were not as daring, for example showing evidence of ageing. In either case, the father painting is far more closely detailed, especially in the lining of clothing, which is summary in Barbara's panel, compared to the long seam of her husband's gown. This contrast in detail can also be seen in the treatment of the rosaries, which are given prominence and a glowing red colour in his panel, but are small and relegated in hers.Albrecht the Elder's panel is usually, but not always, thought to be the first of the two to be executed and, if so, is the earliest extant example of his son's painting. In contrast, a number of art historians have noted that his mother's portrait contains bland passages, especially around the eyes and may be a near-contemporary copy of a lost original. Lotte Brand Philip believes the clumsiness in the mother panel indicated that Dürer painted it first, as a youthful attempt at portraiture, and that Albrecht the Elder might have later "commissioned" his own portrait to pair with Barbara's. Recent technical examination of the two panels confirms that Barbara's portrait was painted later than her husband's.

Answer: What is the name of the person that completed his apprenticeship with Michael Wolgemut?


Question: 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.

Answer: What is the nickname of the group that screened out many potential recruits?


Question: Passage: The seventh and eighth major Nine Inch Nails studio-releases, Ghosts I–IV and The Slip, were released in March and May 2008 respectively. Both albums feature contributions from live-band member Alessandro Cortini.  Since the release of Ghosts I–IV, a 25-date tour was announced in several North American cities.  Cortini and Freese returned as members from the previous tour, while Robin Finck rejoined the band.  The lineup was initially to include Rich Fownes, but before any scheduled performances it was revealed that Justin Meldal-Johnsen would instead be contributing on bass guitar.
Supporting acts for the tour include Deerhunter, Crystal Castles, Does It Offend You, Yeah?, Ghostland Observatory, A Place to Bury Strangers, and White Williams. In early June, a tour EP was released for free on the Nine Inch Nails website featuring four songs from the supporting artists and one from Nine Inch Nails.  The files are DRM-free MP3s that are fully tagged, and included with the download are desktop wallpapers and a printable tour poster.
The band headlined the 2008 Lollapalooza festival, the 2008 Virgin Festival, and the first Pemberton Music Festival.
In May 2008, Nine Inch Nails announced that premium seating for all the upcoming 2008 tour shows would be offered in a pre-sale for fans who registered at the official Nine Inch Nails website. In an effort to combat ticket scalpers, each concert ticket will list the purchaser's legal name.  The ticketing process was previously used for smaller pre-sales and was available exclusively to fan club members.
On July 26, Reznor introduced an "unplugged" portion into the live show in which the band steps to the front of the stage about an hour into the show, with Reznor on vibraphone and bassist Meldal-Johnsen playing an upright bass. The 20-minute jazzy, acoustic set is taken mostly from Ghosts I - IV.  The stage show also featured mesh LED curtains that projected various visuals, ranging from falling rain to static to a ruined city, and made the band appear to be playing on "a stage that appeared to be constructed entirely out of lights." Nine Inch Nails later confirmed that the tour was to extend to South America  and it was thought this would be the last Americas set of dates but soon after Reznor announced yet more North American dates including two dates in tourist capital Florida.
On October 8, 2008, after finishing up their last show in South America, Reznor posted on the official Nine Inch Nails website blog that Josh Freese would be leaving the band following the completion of the current tour. Shortly after, it was announced that Alessandro Cortini would also be leaving the band. On November 15, 2008, Reznor announced via the official Nine Inch Nails website that Ilan Rubin of Lostprophets would be replacing Freese after his departure at the end of 2008. No replacement was announced for Cortini, and the band subsequently toured as a 4-piece without a full-time keyboard player.

Answer:
What is the eighth major Nine Inch Nails release?