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: The most-commonly accepted theory is that these events were triggered by the onset of an ice age, in the Hirnantian faunal stage that ended the long, stable greenhouse conditions typical of the Ordovician. The ice age was probably not as long-lasting as once thought; study of oxygen isotopes in fossil brachiopods shows that it was probably no longer than 0.5 to 1.5 million years. The event was preceded by a fall in atmospheric carbon dioxide (from 7000ppm to 4400ppm) which selectively affected the shallow seas where most organisms lived. As the southern supercontinent Gondwana drifted over the South Pole, ice caps formed on it. Evidence of these ice caps have been detected in Upper Ordovician rock strata of North Africa and then-adjacent northeastern South America, which were south-polar locations at the time.
[EX A]: What faunel stage triggered the greenhouse conditions of the Ordovician?

[EX Q]: Passage: Vacuum is space void of matter. The word stems from the Latin adjective vacuus for "vacant" or "void". An approximation to such vacuum is a region with a gaseous pressure much less than atmospheric pressure. Physicists often discuss ideal test results that would occur in a perfect vacuum, which they sometimes simply call "vacuum" or free space, and use the term partial vacuum to refer to an actual imperfect vacuum as one might have in a laboratory or in space. In engineering and applied physics on the other hand, vacuum refers to any space in which the pressure is lower than atmospheric pressure. The Latin term in vacuo is used to describe an object as being in what would otherwise be a vacuum.
[EX A]: What Latin adjective does atmospheric pressure come from?

[EX Q]: Passage: In 1977, the Supreme Court's Coker v. Georgia decision barred the death penalty for rape of an adult woman, and implied that the death penalty was inappropriate for any offense against another person other than murder. Prior to the decision, the death penalty for rape of an adult had been gradually phased out in the United States, and at the time of the decision, the State of Georgia and the U.S. Federal government were the only two jurisdictions to still retain the death penalty for that offense. However, three states maintained the death penalty for child rape, as the Coker decision only imposed a ban on executions for the rape of an adult woman. In 2008, the Kennedy v. Louisiana decision barred the death penalty for child rape. The result of these two decisions means that the death penalty in the United States is largely restricted to cases where the defendant took the life of another human being. The current federal kidnapping statute, however, may be exempt because the death penalty applies if the victim dies in the perpetrator's custody, not necessarily by his hand, thus stipulating a resulting death, which was the wording of the objection. In addition, the Federal government retains the death penalty for non-murder offenses that are considered crimes against the state, including treason, espionage, and crimes under military jurisdiction.
[EX A]:
In what year was Coker v. Georgia not decided?