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: Ann Arbor is a major scene of college sports, most notably at the University of Michigan, a member of the Big Ten Conference. Several well-known college sports facilities exist in the city, including Michigan Stadium, the largest American football stadium in the world. The stadium was completed in 1927 and cost more than $950,000 to build. It has a 109,901 seating capacity after multiple renovations were made. The stadium is colloquially known as "The Big House". Crisler Center and Yost Ice Arena play host to the school's basketball (both men's and women's) and ice hockey teams, respectively. Concordia University, a member of the NAIA, also fields sports teams.

SOLUTION: What stadium was completed in 1972?

PROBLEM: Passage: Heresy is any provocative belief or theory that is strongly at variance with established beliefs or customs. A heretic is a proponent of such claims or beliefs. Heresy is distinct from both apostasy, which is the explicit renunciation of one's religion, principles or cause, and blasphemy, which is an impious utterance or action concerning God or sacred things.

SOLUTION: What is belief in a strongly held custom?

PROBLEM: Passage: Cara Cusumano, director of the Tribeca Film Festival, stated in April 2014: "Piracy is less about people not wanting to pay and more about just wanting the immediacy – people saying, 'I want to watch Spiderman right now' and downloading it". The statement occurred during the third year that the festival used the Internet to present its content, while it was the first year that it featured a showcase of content producers who work exclusively online. Cusumano further explained that downloading behavior is not merely conducted by people who merely want to obtain content for free:

SOLUTION:
What did Cara Cusumano say about piracy in 2013 that people want?