TASK DEFINITION: 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.
PROBLEM: Passage: From 1997 to 2004, Dell enjoyed steady growth and it gained market share from competitors even during industry slumps. During the same period, rival PC vendors such as Compaq, Gateway, IBM, Packard Bell, and AST Research struggled and eventually left the market or were bought out. Dell surpassed Compaq to become the largest PC manufacturer in 1999. Operating costs made up only 10 percent of Dell's $35 billion in revenue in 2002, compared with 21 percent of revenue at Hewlett-Packard, 25 percent at Gateway, and 46 percent at Cisco. In 2002, when Compaq merged with Hewlett Packard (the fourth-place PC maker), the newly combined Hewlett Packard took the top spot but struggled and Dell soon regained its lead. Dell grew the fastest in the early 2000s.

SOLUTION: What did Dell enjoy from 1996 to 2004?

PROBLEM: Passage: In Lebanon, a part of the Christian population considers "Lebanese" to be in some sense a distinct language from Arabic and not merely a dialect. During the civil war Christians often used Lebanese Arabic officially, and sporadically used the Latin script to write Lebanese, thus further distinguishing it from Arabic. All Lebanese laws are written in the standard literary form of Arabic, though parliamentary debate may be conducted in Lebanese Arabic.

SOLUTION: Where is Lebanese considered a dialect and not a distinct language?

PROBLEM: Passage: Burke's last publications were the Letters on a Regicide Peace (October 1796), called forth by negotiations for peace with France by the Pitt government. Burke regarded this as appeasement, injurious to national dignity and honour. In his Second Letter, Burke wrote of the French Revolutionary Government: "Individuality is left out of their scheme of government. The State is all in all. Everything is referred to the production of force; afterwards, everything is trusted to the use of it. It is military in its principle, in its maxims, in its spirit, and in all its movements. The State has dominion and conquest for its sole objects—dominion over minds by proselytism, over bodies by arms".

SOLUTION:
What was Pitt's last publication?