This task is about creating an unanswerable question based on a given passage. Construct a question that looks relevant to the given context but is unanswerable. Following are a few suggestions about how to create unanswerable questions:
(i) create questions which require satisfying a constraint that is not mentioned in the passage
(ii) create questions which require information beyond what is provided in the passage in order to answer
(iii) replace an existing entity, number, date mentioned in the passage with other entity, number, date and use it in the question
(iv) create a question which is answerable from the passage and then replace one or two words by their antonyms or insert/remove negation words to make it unanswerable.

[EX Q]: Passage: External evidence is evidence of each physical witness, its date, source, and relationship to other known witnesses. Critics will often prefer the readings supported by the oldest witnesses. Since errors tend to accumulate, older manuscripts should have fewer errors. Readings supported by a majority of witnesses are also usually preferred, since these are less likely to reflect accidents or individual biases. For the same reasons, the most geographically diverse witnesses are preferred. Some manuscripts show evidence that particular care was taken in their composition, for example, by including alternative readings in their margins, demonstrating that more than one prior copy (exemplar) was consulted in producing the current one. Other factors being equal, these are the best witnesses. The role of the textual critic is necessary when these basic criteria are in conflict. For instance, there will typically be fewer early copies, and a larger number of later copies. The textual critic will attempt to balance these criteria, to determine the original text.
[EX A]: External evidence is evidence of each physical witness, its date, source, relationship to other known witnesses, and what else? 

[EX Q]: Passage: West of the Rocky Mountains lies the Intermontane Plateaus (also known as the Intermountain West), a large, arid desert lying between the Rockies and the Cascades and Sierra Nevada ranges. The large southern portion, known as the Great Basin, consists of salt flats, drainage basins, and many small north-south mountain ranges. The Southwest is predominantly a low-lying desert region. A portion known as the Colorado Plateau, centered around the Four Corners region, is considered to have some of the most spectacular scenery in the world. It is accentuated in such national parks as Grand Canyon, Arches, Mesa Verde National Park and Bryce Canyon, among others. Other smaller Intermontane areas include the Columbia Plateau covering eastern Washington, western Idaho and northeast Oregon and the Snake River Plain in Southern Idaho.
[EX A]: What is the name of the plateau that lies east of the Rocky Mountains?

[EX Q]: Passage: For years Burke pursued impeachment efforts against Warren Hastings, formerly Governor-General of Bengal, that resulted in the trial during 1786. His interaction with the British dominion of India began well before Hastings' impeachment trial. For two decades prior to the impeachment, Parliament had dealt with the Indian issue. This trial was the pinnacle of years of unrest and deliberation. In 1781 Burke was first able to delve into the issues surrounding the East India Company when he was appointed Chairman of the Commons Select Committee on East Indian Affairs—from that point until the end of the trial; India was Burke's primary concern. This committee was charged "to investigate alleged injustices in Bengal, the war with Hyder Ali, and other Indian difficulties". While Burke and the committee focused their attention on these matters, a second 'secret' committee was formed to assess the same issues. Both committee reports were written by Burke. Among other purposes, the reports conveyed to the Indian princes that Britain would not wage war on them, along with demanding that the HEIC recall Hastings. This was Burke's first call for substantive change regarding imperial practices. When addressing the whole House of Commons regarding the committee report, Burke described the Indian issue as one that "began 'in commerce' but 'ended in empire.'"
[EX A]:
Who attempted to impeach Burke?