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: The United States Mint produces Proof Sets specifically for collectors and speculators. Silver Proofs tend to be the standard designs but with the dime, quarter, and half dollar containing 90% silver. Starting in 1983 and ending in 1997, the Mint also produced proof sets containing the year's commemorative coins alongside the regular coins. Another type of proof set is the Presidential Dollar Proof Set where four special $1 coins are minted each year featuring a president. Because of budget constraints and increasing stockpiles of these relatively unpopular coins, the production of new Presidential dollar coins for circulation was suspended on December 13, 2011, by U.S. Treasury Secretary Timothy F. Geithner. Future minting of such coins will be made solely for collectors.

SOLUTION: What is specifically produced for budget constraints?

PROBLEM: Passage: In Ireland, private schools (Irish: scoil phríobháideach) are unusual because a certain number of teacher's salaries are paid by the State. If the school wishes to employ extra teachers they are paid for with school fees, which tend to be relatively low in Ireland compared to the rest of the world. There is, however, a limited element of state assessment of private schools, because of the requirement that the state ensure that children receive a certain minimum education; Irish private schools must still work towards the Junior Certificate and the Leaving Certificate, for example. Many private schools in Ireland also double as boarding schools. The average fee is around €5,000 annually for most schools, but some of these schools also provide boarding and the fees may then rise up to €25,000 per year. The fee-paying schools are usually run by a religious order, i.e., the Society of Jesus or Congregation of Christian Brothers, etc.

SOLUTION: What is the Irish term for school fees?

PROBLEM: Passage: Diarrhea, also spelled diarrhoea, is the condition of having at least three loose or liquid bowel movements each day. It often lasts for a few days and can result in dehydration due to fluid loss. Signs of dehydration often begin with loss of the normal stretchiness of the skin and irritable behaviour. This can progress to decreased urination, loss of skin color, a fast heart rate, and a decrease in responsiveness as it becomes more severe. Loose but non-watery stools in babies who are breastfed, however, may be normal.

SOLUTION:
What condition is characterized by loose and watery stools in babies?