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: Adam, a medical student, is lured to a cabin far from civilization where he volunteers to be repeatedly killed and reanimated by Dr. Franklin Vick, through use of a mysterious serum. While "Subject Two" as he is initially successful, he begins to experience violent seizures and excruciating pain, begging Vick to kill him or committing suicide several times. Adam eventually gains complete immortality and near instantaneous regeneration, but as a consequence he loses the very sense of being alive; he can no longer feel things (including pain) and no longer can have emotions. His eyes turn snow white, and, to compensate for the gradual loss of his sense of self, he becomes violent and depressed, going so far as to kill a hunter that accidentally shoots him rather than risk him exposing the project. Eventually the student leaves Vick, only to become a walking ghost doomed to walk the earth for eternity. After returning home, "Vick" finds the real Dr. Franklin Vick, and it is revealed that the doctor for the course of the entire movie was his assistant, Subject One. Thinking that he had accidentally killed Dr. Vick, Subject One assumed his identity to continue the work, but finds that the serum was initially perfect, and it was only his tampering that gradually changed Adam. Dr. Vick scolds him before strangling him in a similar fashion to Adam, and thus begins the experiment cycle over again. It carries several obvious homages to Frankenstein but explores more the emotional effects of death and pseudo-life.

A: Whose eyes turn snow white?
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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?
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Q: Passage: The film begins with a U.S. Army commander dictating a report.  Held prisoner in the commander's office, in a fort that has been almost totally destroyed, is the Arapaho Indian war chief, Hanu.  He says very little.  Within the fort's ruins have been found a single grave and a Colt pistol once owned by a gunman Hanu describes as a "quiet, lonely man..." At this point the action of the movie commences.
A wandering gunman, Chuka, rides into an Arapaho camp. It is winter and everyone in the camp is starving, so he gives them some food. Shortly afterwards Chuka crosses paths with a stagecoach taking Mexican passengers Senora Veronica Kleitz and her niece Senorita Helena Chavez through the territory.  Chuka and Kleitz look hard at each other. Suddenly mounted Arapaho warriors, led by Hanu, surround the coach.  Everyone connected to the stagecoach expects to be killed, but Hanu recognizes Chuka and the braves simply ride on.
Chuka accompanies the coach to a nearby U.S. Army fort.  The outpost's commander, Colonel Stuart Valois, is worried the Arapahos may have ambushed his overdue patrol and refuses to allow the civilians to leave. He sends out his scout Lou Trent to reconnoiter, but the horse returns without the rider.

A:
Who does the Indian war chief recognize?
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