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: India started the construction of a 40,000-tonne, 260-metre-long (850 ft) Vikrant-class aircraft carrier in 2009. The new carrier will operate MiG-29K and naval HAL Tejas aircraft along with the Indian-made helicopter HAL Dhruv. The ship will be powered by four gas-turbine engines and will have a range of 8,000 nautical miles (15,000 kilometres), carrying 160 officers, 1,400 sailors, and 30 aircraft. The carrier is being constructed by Cochin Shipyard. The ship was launched in August 2013 and is scheduled for commissioning in 2018.

SOLUTION: Who finished construction of a 40,000-tonne Vikrant-class carrier in 2009?

PROBLEM: Passage: The first union was built on campus in 1926 as a campus community center. The unions are still the "living rooms" of campus today and include three locations the Kansas Union and Burge Union at the Lawrence Campus and Jayhawk Central at the Edwards Campus. The KU Memorial Unions Corporation manages the KU Bookstore (with seven locations). The KU Bookstore is the official bookstore of KU. The Corporation also includes KU Dining Services, with more than 20 campus locations, including The Market (inside the Kansas Union) and The Underground (located in Wescoe Hall). The KU Bookstore and KU Dining Services are not-for-profit, with proceeds going back to support student programs, such as Student Union Activities.

SOLUTION: When was KU's last student union constructed?

PROBLEM: 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)

SOLUTION:
What is the largest school district in Canada?