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 first extant Estonian book is a bilingual German-Estonian translation of the Lutheran catechism by S. Wanradt and J. Koell dating to 1535, during the Protestant Reformation period. An Estonian grammar book to be used by priests was printed in German in 1637. The New Testament was translated into southern Estonian in 1686 (northern Estonian, 1715). The two languages were united based on northern Estonian by Anton thor Helle.
[EX A]: Who wrote the last Estonian book? 

[EX Q]: Passage: Gun usage in hunting is typically regulated by game category, area within the state, and time period. Regulations for big-game hunting often specify a minimum caliber or muzzle energy for firearms. The use of rifles is often banned for safety reasons in areas with high population densities or limited topographic relief. Regulations may also limit or ban the use of lead in ammunition because of environmental concerns. Specific seasons for bow hunting or muzzle-loading black-powder guns are often established to limit competition with hunters using more effective weapons.
[EX A]: By what category is bow hunting regulated?

[EX Q]: Passage: After repeated efforts by the Samoan independence movement, the New Zealand Western Samoa Act 1961 of 24 November 1961 granted Samoa independence effective 1 January 1962, upon which the Trusteeship Agreement terminated. Samoa also signed a friendship treaty with New Zealand. Samoa, the first small-island country in the Pacific to become independent, joined the Commonwealth of Nations on 28 August 1970. While independence was achieved at the beginning of January, Samoa annually celebrates 1 June as its independence day.
[EX A]:
When was New Zealand granted independence?