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.
--------
Question: 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.

Answer: Who wrote the last Estonian book? 


Question: Passage: Newton's Second Law asserts the direct proportionality of acceleration to force and the inverse proportionality of acceleration to mass. Accelerations can be defined through kinematic measurements. However, while kinematics are well-described through reference frame analysis in advanced physics, there are still deep questions that remain as to what is the proper definition of mass. General relativity offers an equivalence between space-time and mass, but lacking a coherent theory of quantum gravity, it is unclear as to how or whether this connection is relevant on microscales. With some justification, Newton's second law can be taken as a quantitative definition of mass by writing the law as an equality; the relative units of force and mass then are fixed.

Answer: Newton's Third Law asserts the direct proportionality of acceleration to what?


Question: Passage: In the fifth century Strasbourg was occupied successively by Alemanni, Huns, and Franks. In the ninth century it was commonly known as Strazburg in the local language, as documented in 842 by the Oaths of Strasbourg. This trilingual text contains, alongside texts in Latin and Old High German (teudisca lingua), the oldest written variety of Gallo-Romance (lingua romana) clearly distinct from Latin, the ancestor of Old French. The town was also called Stratisburgum or Strateburgus in Latin, from which later came Strossburi in Alsatian and Straßburg in Standard German, and then Strasbourg in French. The Oaths of Strasbourg is considered as marking the birth of the two countries of France and Germany with the division of the Carolingian Empire.

Answer:
What modern day area did the Carolingian Empire occupy?