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: When Scranton agreed to take on Steamtown, U.S.A., it was estimated that the museum and excursion business would attract 200,000 to 400,000 visitors to the city every year.  In anticipation of this economic boon, the city and a private developer spent $13 million to renovate the Delaware, Lackawanna and Western Railroad (DL&W) station and transform it into a Hilton hotel, at a time when the unemployment rate in the city was 13 percent.  Only 60,000 visitors showed up at Steamtown in 1987, and the 1988 excursions were canceled. After only three years, it was $2.2 million in debt and facing bankruptcy. Part of the problem was the cost of restoration of the new property and the deteriorating equipment. In addition, while the tourists in Vermont had enjoyed the sights of cornfields, farms, covered bridges, a waterfall and a gorge on a Steamtown excursion, the Scranton trip to Moscow, Pennsylvania, cut through one of the nation's largest junkyards, an eyesore described by Ralph Nader as "the eighth wonder of the world".In 1986, the U.S. House of Representatives, under the urging of Scranton native, Representative Joseph M. McDade, voted to approve the spending of $8 million to study the collection and to begin the process of making it a National Historic Site. By 1995, Steamtown was acquired and developed by the National Park Service (NPS) at a total cost of $66 million, and opened as Steamtown National Historic Site the same year. In preparation for its acquisition of the collection, the NPS had conducted historical research during 1987 and 1988 on the equipment that still remained in the foundation's possession. This research was used for a Scope of Collections Statement for Steamtown National Historic Site and was published in 1991 under the title Steamtown Special History Study. Aside from providing concise histories of the equipment, the report also made recommendations as to whether or not each piece belonged in the now government-funded collection. Historical significance to the United States was a criterion of the recommendations. Many of the pieces of equipment that did not meet the report's recommendations were sold or traded for pieces that had historical significance to the DL&W grounds on which the site is located.
[A]: What city was expecting to have an economic boon?


[Q]: Passage: A man unveils a valuable painting he picked up for $50,000 and is killed. A card with a large black ace (of spades) is put on his chest. Another "Black Ace" victim. The killer sends his victims a Black Ace card, warning them they are to die and then kills them, his way of taunting the police. Neil Broderick, an author, intends writing a book about him and is on his way to see Thornton Drake to get more information about him. Austin Winters is his secretary and Neil met his daughter Martha on the train, on the way to Chicago.
Drake has just received a Black Ace, with the words: "At seven tomorrow night", the time he is to be killed. Two plainclothes cops arrive from police headquarters, having had a call, Clancy and Dugan (both incompetents). Martha suggests that they leave for Drake's Louisiana plantation tomorrow morning and be far away from there at seven tomorrow night. Drake agrees and suggests they all go. On the flight, the lights go off for some seconds and when they come on again, Austin Winters is dead without a mark on him.
At the plantation, Clancy ineptly questions the suspects till Neil points out that they are now in another state, so out of their jurisdiction. Neil goes to another room and makes a phone call, then signals to someone outside. After he finishes his call, the line is cut. Meanwhile one of the pilots has taken off in the plane, leaving the other pilot, Henderson, behind who claims he does not know anything though he was out of the cockpit when Winters was killed.
The coroner finds a letter on the dead man which is to be read if Winters dies. It will reveal the identity of the Black Ace. Clancy starts reading it aloud and unsurprisingly the lights go off and the letter has vanished when the lights are turned on again. People locked in their rooms that night and Neil has a hidden car outside signal to him.
[A]: Who is Neil Broderick writing a book about?


[Q]: Passage: The Balts were largely driven to unite by external threats from aggressive German religious orders. In 1202, the Order of the Livonian Brothers of the Sword was established by Albert, the Bishop of Riga, to promote the Christianization and conquest of the Livonians, Curonians, Semigallians, and Estonians near the Gulf of Riga. The Order waged a number of successful campaigns and posed a great danger to the Lithuanian territories. The Order's progress was halted by its defeat at the Battle of Saule in 1236, after which it almost collapsed. The following year, it merged into the Teutonic Knights.In 1226, Konrad I of Masovia invited the Teutonic Knights to defend his borders and subdue the Prussians, offering the Knights the use of Chełmno (Kulm) as a base for their campaign. In 1230, they settled in Chełmno, built a castle, and began attacking Prussian lands. After 44 years, and despite two Prussian uprisings against them, they had conquered most of the Prussian tribes. Afterwards, the Knights spent nine years conquering the Nadruvians, Skalvians, and Yotvingians, and from 1283, they were better positioned to threaten the young Lithuanian state from the west.
Further unification of the Lithuanian tribes was facilitated by the social changes that took place in Lithuania during this period. Private land ownership was established (allodiums, Lithuanian: atolai), which would later evolve into a feudal system. As attested by many chronicles, it was the principal form of organization governing land ownership in the 13th century. Under this system, known in England as primogeniture, only the eldest son could inherit lands, which allowed dukes to consolidate their holdings. Social classes and divisions of labor also began taking shape. There were classes of experienced soldiers (bajoras), of free peasants (laukininkas), and of "unfree" people (kaimynas and šeimynykštis). In order to enforce this social structure, a united state was needed. Another force behind unification was the desire to take advantage of Ruthenian lands, which were suffering from the Mongol invasion. Temporary alliances among Lithuanian dukes often sufficed for military ventures into, and plundering of, these lands (including Pskov, plundered in 1213). Altogether, between 1201 and 1236, Lithuanians launched at least 22 incursions into Livonia, 14 into Rus, and 4 into Poland. The ongoing administration of conquered territories, however, required a strong and unified central power.
[A]:
What is the full name of the group that posed a great danger to the Lithuanian territories and waged a number of successful campaigns?