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: William Hulton, the chairman of the magistrates watching from the house on the edge of St Peter's Field, saw the enthusiastic reception that Hunt received on his arrival at the assembly, and it encouraged him to action. He issued an arrest warrant for Henry Hunt, Joseph Johnson, John Knight, and James Moorhouse. On being handed the warrant the Constable, Jonathan Andrews, offered his opinion that the press of the crowd surrounding the hustings would make military assistance necessary for its execution. Hulton then wrote two letters, one to Major Thomas Trafford, the commanding officer of the Manchester and Salford Yeomanry Cavalry, and the other to the overall military commander in Manchester, Lieutenant Colonel Guy L'Estrange. The contents of both notes were similar:
Sir, as chairman of the select committee of magistrates, I request you to proceed immediately to no. 6 Mount Street, where the magistrates are assembled. They consider the Civil Power wholly inadequate to preserve the peace. I have the honour, & c. Wm. Hulton.
The notes were handed to two horsemen who were standing by. The Manchester and Salford Yeomanry were stationed just a short distance away in Portland Street, and so received their note first. They immediately drew their swords and galloped towards St Peter's Field. One trooper, in a frantic attempt to catch up, knocked down a woman in Cooper Street, causing the death of her son when he was thrown from her arms; two-year-old William Fildes was the first casualty of Peterloo.Sixty cavalrymen of the Manchester and Salford Yeomanry, led by Captain Hugh Hornby Birley, a local factory owner, arrived at the house from where the magistrates were watching; some reports allege that they were drunk. Andrews, the Chief Constable, instructed Birley that he had an arrest warrant which he needed assistance to execute. Birley was asked to take his cavalry to the hustings to allow the speakers to be removed; it was by then about 1:40 pm.
The route towards the hustings between the special constables was narrow, and as the inexperienced horses were thrust further and further into the crowd they reared and plunged as people tried to get out of their way. The arrest warrant had been given to the Deputy Constable, Joseph Nadin, who followed behind the yeomanry. As the cavalry pushed towards the speakers' stand they became stuck in the crowd, and in panic started to hack about them with their sabres. On his arrival at the stand Nadin arrested Hunt, Johnson and a number of others including John Tyas, the reporter from The Times. Their mission to execute the arrest warrant having been achieved, the yeomanry set about destroying the banners and flags on the stand. According to Tyas, the yeomanry then attempted to reach flags in the crowd "cutting most indiscriminately to the right and to the left to get at them" – only then (said Tyas) were brickbats thrown at the military: "From this point the Manchester and Salford Yeomanry lost all command of temper".
[EX A]: What is the first name of the person who wrote a letter to Major Thomas Trafford?

[EX Q]: Passage: There are two major valleys in the park, Death Valley and Panamint Valley. Both of these valleys were formed within the last few million years and both are bounded by north–south-trending mountain ranges. These and adjacent valleys follow the general trend of Basin and Range topography with one modification: there are parallel strike-slip faults that perpendicularly bound the central extent of Death Valley. The result of this shearing action is additional extension in the central part of Death Valley which causes a slight widening and more subsidence there.
Uplift of surrounding mountain ranges and subsidence of the valley floor are both occurring. The uplift on the Black Mountains is so fast that the alluvial fans (fan-shaped deposits at the mouth of canyons) there are small and steep compared to the huge alluvial fans coming off the Panamint Range. Fast uplift of a mountain range in an arid environment often does not allow its canyons enough time to cut a classic V-shape all the way down to the stream bed. Instead, a V-shape ends at a slot canyon halfway down, forming a 'wine glass canyon.'  Sediment is deposited on a small and steep alluvial fan.
At 282 feet (86 m) below sea level at its lowest point, Badwater Basin on Death Valley's floor is the second-lowest depression in the Western Hemisphere (behind Laguna del Carbón in Argentina), while Mount Whitney, only 85 miles (137 km) to the west, rises to 14,505 feet (4,421 m). This topographic relief is the greatest elevation gradient in the contiguous United States and is the terminus point of the Great Basin's southwestern drainage. Although the extreme lack of water in the Great Basin makes this distinction of little current practical use, it does mean that in wetter times the lake that once filled Death Valley (Lake Manly) was the last stop for water flowing in the region, meaning the water there was saturated in dissolved materials. Thus the salt pans in Death Valley are among the largest in the world and are rich in minerals, such as borax and various salts and hydrates. The largest salt pan in the park extends 40 miles (64 km) from the Ashford Mill Site to the Salt Creek Hills, covering some 200 square miles (520 km2) of the valley floor. The best known playa in the park is the Racetrack, known for its moving rocks.
[EX A]: What is the lowest point of Death Valley?

[EX Q]: Passage: At the train station, Mr. Givney is doing some paper work when a rat pops out of a hole. After the rat eats his sock and belt, Mr. Givney pulls out a revolver and guns down the rodent. He then comes outside and orders Jerry to deal with the station's rat problem.
In no time Jerry comes up with using his saxophone. When Jerry plays on his instrument, the rats are mesmerized by the melody as they come out from various openings in the station. Jerry, while still playing, walks further from the station, and the rats follow him. Mr. Givney also comes along to see Jerry's handling.
Jerry lures the rats into a lake, hoping they would drown. Thinking the plan worked, Mr. Givney picks up Jerry like a beloved son, gives complimentary kisses, and carries him back to the station.
Back at the lake, a train stops to refill its boiler. The train engineer inserts a hose into the lake to take up water. It appears the rats are not completely drown as they pass through the hose.
Minutes later, the train arrives at the station. Jerry is excited, and Mr. Givney shows up. To their surprise, what comes out are the rats Jerry removed previously. Jerry and Mr. Givney then cling onto the edges of the door, and watch the rats run back into the openings inside.
[EX A]:
What passes through the hose when the train engineer inserts it into the lake?