instruction:
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 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.
answer:
When was KU's last student union constructed?


question:
Passage: Shell's primary business is the management of a vertically integrated oil company. The development of technical and commercial expertise in all stages of this vertical integration, from the initial search for oil (exploration) through its harvesting (production), transportation, refining and finally trading and marketing established the core competencies on which the company was founded. Similar competencies were required for natural gas, which has become one of the most important businesses in which Shell is involved, and which contributes a significant proportion of the company's profits. While the vertically integrated business model provided significant economies of scale and barriers to entry, each business now seeks to be a self-supporting unit without subsidies from other parts of the company.
answer:
What is the least important business for Shell?


question:
Passage: Figures obtained by The Daily Telegraph had revealed that, in 2010, 37 applicants from Eton were accepted by Oxford whilst state schools had difficulty obtaining entry even for pupils with the country's most impressive exam results. According to The Economist, Oxford and Cambridge admit more Etonians each year than applicants from the whole country who qualify for free school meals. In April 2011 the Labour MP David Lammy described as unfair and 'indefensible' the fact that Oxford University had organised nine 'outreach events' at Eton in 2010, although he admitted that it had, in fact, held fewer such events for Eton than for another independent school, Wellington College.
answer:

How many Eton "outreach events" were held at Wellington College in 2010?