TASK DEFINITION: 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.
PROBLEM: Passage: A preacher witnesses his family and a group of refugees seeking shelter in his church murdered by a gang of ruthless outlaws led by Colonel Cusack.  After his wife makes him promise to never seek revenge, he instead becomes a bounty hunter. When he steps in to defend a woman in a saloon, the bad guy and his two friends (who happen to be allied with The Colonel), give him a beating and toss him into the street.
A woman with a "past", named Maggie, takes him in to care for him. He stays in her extra room, but she insists he give up his gun while at her home because she has a daughter.
The local sheriff, on Cusacks's payroll, is meanwhile trying to run off some squatters. The Sheriff's gang attempts to intimidate the squatters, but once The Preacher learns of the Sheriff's and The Colonel's dealings, he visits the squatters, who tell him they paid for the land but never got the deed. A few days later the Sheriff's posse burns down a few of the squatter's tents.
The Preacher attempts to negotiate peacefully with the Sheriff, and so visits Cusack.  Cusack tries to persuade The Preacher to join his mob, which he refuses.  The Sheriff then sends a message to The Preacher by having some of his men rough up Maggie. Unarmed still because of his agreement with Maggie, The Preacher catches the gang in the act and overcomes one of the men's guns, scaring the men off.
The Preacher gets his gun back from Maggie and sets out to visit the Squatters again, and is met by the Sheriff and some of his gang. The Preacher, now armed, tells the Sheriff that the squatters have a right to stay. Gunfire ensues, and The Preacher shoots the sheriff. The rest of the bad guys run off.

SOLUTION: What was the bounty hunter previously?

PROBLEM: Passage: I was told that I did not learn respect at school. I learned one thing: I learned about self-respect and self-regard for Australia—not about some cultural cringe to a country which decided not to defend the Malayan peninsula, not to worry about Singapore and not to give us our troops back to keep ourselves free from Japanese domination. This was the country that you people wedded yourself to, and even as it walked out on you and joined the Common Market, you were still looking for your MBEs and your knighthoods, and all the rest of the regalia that comes with it.
A fleet was necessary for the defeat of Japan, and eventually a sizeable one, the British Pacific Fleet, did go to the Far East, where it fought alongside the United States Pacific Fleet. The closer relations that developed between the two navies prior to the outbreak of war with Japan, and the alliance that developed from it afterwards, became the most positive and enduring strategic legacy of the Singapore strategy.The Singapore Naval Base suffered little damage in the fighting and became the Imperial Japanese Navy's most important facility outside of the Japanese home islands. The 15-inch guns were sabotaged by the British before the fall of Singapore, and four of them were deemed beyond repair and scrapped by the Japanese. The floating dry dock was scuttled by the British, but raised by the Japanese. It was damaged beyond repair by a raid by Boeing B-29 Superfortresses in February 1945, and ultimately towed out to sea and dumped in 1946. The Royal Navy retook possession of the Singapore base in 1945.

SOLUTION: What did the Royal Navy retake possession of in 1945?

PROBLEM: Passage: Ice drilling allows scientists studying glaciers and ice sheets to gain access to what is beneath the ice, to take measurements along the interior of the ice, and to retrieve samples.  Instruments can be placed in the drilled holes to record temperature, pressure, speed, direction of movement, and for other scientific research, such as neutrino detection.
Many different methods have been used since 1840, when the first scientific ice drilling expedition attempted to drill through the Unteraargletscher in the Alps.  Two early methods were percussion, in which the ice is fractured and pulverized, and rotary drilling, a method often used in mineral exploration for rock drilling.  In the 1940s, thermal drills began to be used; these drills melt the ice by heating the drill.  Drills that use jets of hot water or steam to bore through ice soon followed.  A growing interest in ice cores, used for palaeoclimatological research, led to ice coring drills being developed in the 1950s and 1960s, and there are now many different coring drills in use.  For obtaining ice cores from deep holes, most investigators use cable-suspended electromechanical drills, which use an armoured cable to carry electrical power to a mechanical drill at the bottom of the borehole.
In 1966, a US team successfully drilled through the Greenland ice sheet at Camp Century, at a depth of 1,387 metres (4,551 ft).  Since then many other groups have succeeded in reaching bedrock through the two largest ice sheets, in Greenland and Antarctica.  Recent projects have focused on finding drilling locations that will give scientists access to very old undisturbed ice at the bottom of the borehole, since an undisturbed stratigraphic sequence is required to accurately date the information obtained from the ice.

SOLUTION:
Percussion and rotary drilling are two early methods of what?