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.

Passage: In the year 2074, the cybernetics market is dominated by two rival companies: USA's Pinwheel Robotics and Japan's Kobayashi Electronics. 'Cyborgs' are commonplace, used for anything from soldiers to prostitutes. Casella "Cash" Reese is a Pinwheel prototype cyborg developed for corporate espionage and assassination. She is filled with a liquid explosive called "Glass Shadow". Pinwheel's CEO, Martin Dunn, plans to eliminate the entire Kobayashi board of directors using Cash as a suicide bomber to precipitate a hostile takeover of the company and obtain a monopoly over the cyborg market.
Cash is programmed to mimic human senses and emotions such as fear, love, pain, and hate. Guided by Mercy, a renegade prototype cyborg who can communicate through any electronic device, Cash and her combat trainer Colton "Colt" Ricks escape the Pinwheel facility so Cash can avoid self-destruction, something that most corporate espionage cyborgs face. They're relentlessly pursued by Pinwheel's hired killer or "wiretapper", Daniel Bench.
Bench must also deal with a rival bounty hunter named Chen, who plans on killing Ricks and reprogramming Cash to have her blow up Pinwheel instead as a means to punish the company's director, Dunn, as reprisal for an earlier act from Dunn that displeased her. However, Chen and Ricks get into a fight, which results in Chen getting electrocuted by a fuse box.
Who is the head of the company that makes cyborgs filled with liquid explosive?

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.
What acts as reamers when they fail?

Passage: The reliability of the results can be improved by lengthening the testing time. For example, if counting beta decays for 250 minutes is enough to give an error of 80 years, with 68% confidence, then doubling the counting time to 500 minutes will allow a sample with only half as much 14C to be measured with the same error term of 80 years.Radiocarbon dating is generally limited to dating samples no more than 50,000 years old, as samples older than that have insufficient 14C to be measurable. Older dates have been obtained by using special sample preparation techniques, large samples, and very long measurement times. These techniques can allow measurement of dates up to 60,000 and in some cases up to 75,000 years before the present.Radiocarbon dates are generally presented with a range of one standard deviation (usually represented by the Greek letter sigma as 1) on either side of the mean. However, a date range of 1 represents only 68% confidence level, so the true age of the object being measured may lie outside the range of dates quoted. This was demonstrated in 1970 by an experiment run by the British Museum radiocarbon laboratory, in which weekly measurements were taken on the same sample for six months. The results varied widely (though consistently with a normal distribution of errors in the measurements), and included multiple date ranges (of 1 confidence) that did not overlap with each other. The measurements included one with a range from about 4250 to about 4390 years ago, and another with a range from about 4520 to about 4690.Errors in procedure can also lead to errors in the results. If 1% of the benzene in a modern reference sample accidentally evaporates, scintillation counting will give a radiocarbon age that is too young by about 80 years.
What type of techniques can allow measurement of dates up to 60,000 and in some cases up to 75,000 years before the present?