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.

[EX Q]: Passage: Over the Rainbow is the debut album of the child singer Connie Talbot, and was released 26 November 2007 by Rainbow Recording Company. Talbot, who had entered the public eye after her appearance on the first series of Britain's Got Talent at age six, signed with Rainbow, an independent label, after briefly recording with Sony BMG. Over the Rainbow consists entirely of covers of pop and Christmas songs, and was recorded primarily in a spare room in the house of Talbot's aunt, in an attempt not to interrupt Talbot's childhood by disrupting her regular activities. Although public appearances were initially kept to a minimum, Talbot did make appearances to promote the album, and performed in public several times after the British release.
Over the Rainbow received poor reviews. Though praising Talbot's voice, critics noted a lack of depth in the performances, and questioned the appropriateness of releasing and rating work by such a young artist. The album peaked at number 35 on the UK Albums Chart. Despite its poor chart performance, additional copies of the album had to be pressed after sales were higher than expected. Talbot later toured Asia in support of the album; Over the Rainbow achieved more success on Asian charts, reaching number one in Taiwan, South Korea and Hong Kong.
Over the Rainbow was rereleased on 18 June 2008 with an updated track list, replacing some of the Christmas-themed tracks of the original with more general covers. The first single from the album, a cover of Bob Marley's "Three Little Birds," was released in June 2008, and a music video for the song was shot in Jamaica. On 14 October, the album was released in the US, appearing on several Billboard charts. Talbot visited the US to promote the album, appearing on national television.
[EX A]: What is the name of the company that Connie Talbot first recorded with?

[EX 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.
[EX A]: What acts as reamers when they fail?

[EX Q]: Passage: Earth has been devastated by a nuclear war instigated by five terrorists, and it has taken two million years for the radioactive clouds to once again allow sunlight to reach the surface. Only a handful of humans have survived the apocalypse, while the rest have changed into mutants who roam the radioactive wastelands. Eventually, humanity's true ancestors  – fairies, elves and dwarves – resurfaced and live in the idyllic land of Montagar in peace for three millennia. 
While her people celebrated 3,000 years of peace, their ruler Delia, queen of the fairies, fell into a trance and left the party. Puzzled, the fairies followed her to her home and discover that she has given birth to twin wizards. They were the kindhearted Avatar who spent much of his boyhood entertaining his ailing mother with beautiful visions and his mutated brother Blackwolf, who was pure-evil, never visiting his mother, but spending his time torturing small animals. When Blackwolf learned of their mother's death, he attempted to usurp her leadership, being defeated in duel against a grief-stricken Avatar. Blackwolf left Montagar with a vow to return and "make this a planet where mutants rule".
Years later, Blackwolf has risen to lead the dark land of Scortch, where he and his vast army of goblins, ogres, and mutants salvage and restore ancient technology. He tries to attack Montagar twice, but is foiled both times when his mutant warriors become bored or sidetracked in the midst of battle. Blackwolf then discovers an old projector and reels of Nazi propaganda footage, using his magic to enhance it for psychological warfare: Inspiring his own soldiers while horrifying enemy troops into submission.
[EX A]:
Who is the brother of the mutated wizard?