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.

[EX Q]: Passage: Comcast is sometimes described as a family business. Brian L. Roberts, Chairman, President, and CEO of Comcast, is son of co-founder Ralph Roberts. Roberts owns or controls just over 1% of all Comcast shares but all of the Class B supervoting shares, which gives him an "undilutable 33% voting power over the company". Legal expert Susan P. Crawford has said this gives him "effective control over its [Comcast's] every step". In 2010, he was one of the highest-paid executives in the United States, with total compensation of about $31 million.
[EX A]: Who is Brian L. Robert's son?

[EX Q]: Passage: The average Mongol garrison family of the Yuan dynasty seems to have lived a life of decaying rural leisure, with income from the harvests of their Chinese tenants eaten up by costs of equipping and dispatching men for their tours of duty. The Mongols practiced debt slavery, and by 1290 in all parts of the Mongol Empire commoners were selling their children into slavery. Seeing this as damaging to the Mongol nation, Kublai in 1291 forbade the sale abroad of Mongols. Kublai wished to persuade the Chinese that he was becoming increasingly sinicized while maintaining his Mongolian credentials with his own people. He set up a civilian administration to rule, built a capital within China, supported Chinese religions and culture, and devised suitable economic and political institutions for the court. But at the same time he never abandoned his Mongolian heritage.
[EX A]: By what year was selling children into slavery uncommon among the Mongols?

[EX Q]: Passage: Hanover's leading cabaret-stage is the GOP Variety theatre which is located in the Georgs Palace. Some other famous cabaret-stages are the Variety Marlene, the Uhu-Theatre. the theatre Die Hinterbuhne, the Rampenlich Variety and the revue-stage TAK. The most important Cabaret-Event is the Kleines Fest im Groen Garten (Little Festival in the Great Garden) which is the most successful Cabaret Festival in Germany. It features artists from around the world. Some other important events are the Calenberger Cabaret Weeks, the Hanover Cabaret Festival and the Wintervariety.
[EX A]:
What is Germany's leading cabaret stage?