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.

Passage: The oak forests of the southern and central Appalachians consist largely of black, northern red, white, chestnut and scarlet oaks (Quercus velutina, Q. rubra, Q. alba, Q. prinus and Q. coccinea) and hickories, such as the pignut (Carya glabra) in particular. The richest forests, which grade into mesic types, usually in coves and on gentle slopes, have dominantly white and northern red oaks, while the driest sites are dominated by chestnut oak, or sometimes by scarlet or northern red oaks. In the northern Appalachians the oaks, except for white and northern red, drop out, while the latter extends farthest north.
What is the dominate type of oak in the Appalachians?

Passage: The term cardinal at one time applied to any priest permanently assigned or incardinated to a church, or specifically to the senior priest of an important church, based on the Latin cardo (hinge), meaning "principal" or "chief". The term was applied in this sense as early as the ninth century to the priests of the tituli (parishes) of the diocese of Rome. The Church of England retains an instance of this origin of the title, which is held by the two senior members of the College of Minor Canons of St Paul's Cathedral.
What does the Latin cardo not mean?

Passage: St. John's is served by the Eastern School District, the largest school district in Newfoundland and Labrador by student population. There are currently 36 primary, elementary and secondary schools in the city of St. John's, including three private schools. St. John's also includes one school that is part of the province-wide Conseil Scolaire Francophone (CSF), the Francophone public school district. It also contains two private schools, St. Bonaventure's College and Lakecrest Independent. Atlantic Canada's largest university, Memorial University of Newfoundland (MUN), is located in St. John's. MUN provides comprehensive education and grants degrees in several fields and its historical strengths in engineering, business, geology, and medicine, make MUN one of the top comprehensive universities in Canada. The Fisheries and Marine Institute of Memorial University of Newfoundland (MI) or simply Marine Institute, is a post-secondary ocean and marine polytechnic located in St. John's and is affiliated with Memorial University of Newfoundland. MUN also offers the lowest tuition in Canada ($2,644, per Academic Year)

What is the largest school district in Canada?