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: At the beginning of December 1910 Smoller, using the name Joe Levi, visited Exchange Buildings, a small cul-de-sac that backed onto the properties of Houndsditch. He rented No. 11 Exchange Buildings; a week later Svaars rented number 9 for a month, saying he needed it for storage. The gang were unable to rent number 10, which was directly behind their target, 119 Houndsditch, the jeweller's shop owned by Henry Samuel Harris. The safe in the jeweller's was reputed to contain between 20,000 and 30,000 worth of jewellery; Harris's son later stated the total was only around 7,000. Over the next two weeks the gang brought in various pieces of necessary equipment, including a 60-foot (18.25 m) length of India rubber gas hose, a cylinder of compressed gas and a selection of tools, including diamond-tipped drills.With the exception of Gardstein, the identities of the gang members present in Houndsditch on the night of 16 December 1910 have never been confirmed. Bernard Porter, writing in the Dictionary of National Biography, considers that Sokoloff and Peters were present and, in all likelihood, were two of those who shot the policemen who interrupted their burglary. Porter opines that Peter the Painter was probably not at the property that night, while the journalist J P Eddy suggests that Svaars was among those present. Donald Rumbelow, a former policeman who wrote a history of the events, considers that those present consisted of Gardstein, Smoller, Peters and Dubof, with a second group in case the work needed to continue into the following day, which included among their number Sokolow and Svaars. Rumbelow considers a third group on standby, staying at Hoffman's lodgings, to have comprised Hoffman, Rosen and Osip Federoff, an unemployed locksmith. Rumbelow also considers that present at the eventseither as lookouts or in unknown capacitieswere Peter the Painter and Nina Vassilleva.On 16 December, working from the small yard behind 11 Exchange Buildings, the gang began to break through the back wall of the shop; number 10 had been unoccupied since 12 December. At around 10:00 that evening, returning to his home at 120 Houndsditch, Max Weil heard curious noises coming from his neighbour's property. Outside his house Weil found Police Constable Piper on his beat and informed him of the noises. Piper checked at 118 and 121 Houndsditch, where he could hear the noise, which he thought was unusual enough to investigate further. At 11:00 he knocked at the door of 11 Exchange Buildingsthe only property with a light on in the back. The door was opened in a furtive manner and Piper became suspicious immediately. So as not to rouse the man's concerns, Piper asked him "is the missus in?" The man answered in broken English that she was out, and the policeman said he would return later.
[A]: What is the last name of the man who knocked on the door of 11 Exchange Buildings?

[Q]: Passage: The two main requirements of an anti-torque system are that it should prevent rotation of the sonde, and it should allow easy movement of the drill up and down the borehole. Attempts have been made to design drills with counter-rotating components so that overall torque is minimized, but these have had limited success. Five kinds of anti-torque systems have been devised for use with cable-suspended EM drills, though not all are in current use, and some drills have used a combination of more than one design. The first drill to require an anti-torque system was used at Camp Century by CRREL in 1966; the drill incorporated a set of hinged friction blades that swung out from the sonde when the drill motor was started. These were found to have very weak friction against the borehole wall, and were ineffective; the drill had to be controlled carefully to prevent twisting the cable. No other drills have attempted to use this approach.For the next deployment of the drill leaf springs were installed, and this has proved to be a more durable design. These are mounted vertically, with a curve outwards so that they are easily compressed by the borehole wall, and can slide up and down with the movement of the drill. They pass easily through any areas of irregularity in the borehole, but the edges of the springs cut into the borehole wall and prevent rotation. Leaf springs are very simple mechanically, with the additional benefit of being easy to adjust by changing the spacing between the end points. They can be placed anywhere on the drill that does not rotate, so they do not add length to the sonde. The shape is usually a fourth-order parabola, since this has been determined to provide the most even loading against the borehole wall. Leaf springs have been found to be so effective that they can prevent rotation even in heavy drills running at full power.Skate antitorque systems have blades attached to vertical bars which are pushed against the borehole wall; the blades dig into the wall and provide the anti-torque. Skates can be built with springs which allow them to keep the blades pressed against the wall in an irregular borehole, and to prevent problems in narrower parts of the borehole. Although skates are a popular design for anti-torque and have been used with success, they have difficulty preventing rotation in firn and at boundaries between layers of different densities, and can cause problems when drilling with high torque. When they fail, they act as reamers, removing chips from the wall which can fall to the drillbit and interfere with drilling.
[A]: What acts as reamers when they fail?

[Q]: Passage: Chrismansyah Rahadi ([xrismanah rahadi]; 16 September 1949 30 March 2007), born Christian Rahadi but better known by his stage name of Chrisye ([xri]), was an Indonesian progressive pop singer and songwriter. In his 40-year career he won many awards and accolades; in 2011 Rolling Stone Indonesia declared him the third-greatest Indonesian musician of all time.
Born in Jakarta of mixed Chinese-Indonesian descent, Chrisye became interested in music at an early age. At high school he played bass guitar in a band he formed with his brother, Joris. In the late 1960s he joined Sabda Nada (later Gipsy), a band led by his neighbours, the Nasutions. In 1973, after a short hiatus, he rejoined the band to play in New York for a year. He briefly returned to Indonesia and then went back to New York with another band, the Pro's. After once again returning to Indonesia, he collaborated with Gipsy and Guruh Sukarnoputra to record the 1976 indie album Guruh Gipsy.
Following the success of Guruh Gipsy, in 1977 Chrisye recorded two of his most critically acclaimed works: "Lilin-Lilin Kecil" by James F. Sundah, which eventually became his signature song, and the soundtrack album Badai Pasti Berlalu. Their success landed him a recording contract with Musica Studios, with whom he released his first solo album, Sabda Alam, in 1978. Over his almost 25-year career with Musica he recorded a further eighteen albums, and in 1980 acted in a film, Seindah Rembulan. Chrisye died in his Jakarta home on 30 March 2007 after a long battle with lung cancer.
Known for his stiff stage persona and smooth vocals, Chrisye was critically acclaimed in Indonesia. Five albums to which he contributed were included in Rolling Stone Indonesia's list of the 150 Best Indonesian Albums of All Time; another four of his songs (and a fifth to which he contributed) were classified as some of the best Indonesian songs of all time in a later issue of the same magazine. Several of his albums received certification of silver or gold. He received two lifetime achievement awards, one in 1993 from the BASF Awards and another posthumously in 2007 from Indonesian television station SCTV.
[A]:
What is the first name of the person who briefly returned to Indonesia and then went back to New York with another band, the Pro's?