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 Input:
Passage: In Ancient Greece, green and blue were sometimes considered the same color, and the same word sometimes described the color of the sea and the color of trees. The philosopher Democritus described two different greens; cloron, or pale green, and prasinon, or leek green. Aristotle considered that green was located midway between black, symbolizing the earth, and white, symbolizing water. However, green was not counted among of the four classic colors of Greek painting; red, yellow, black and white, and is rarely found in Greek art.

Ex Output:
How many blues did Democritus describe?


Ex Input:
Passage: The use of alloys by humans started with the use of meteoric iron, a naturally occurring alloy of nickel and iron. It is the main constituent of iron meteorites which occasionally fall down on Earth from outer space. As no metallurgic processes were used to separate iron from nickel, the alloy was used as it was. Meteoric iron could be forged from a red heat to make objects such as tools, weapons, and nails. In many cultures it was shaped by cold hammering into knives and arrowheads. They were often used as anvils. Meteoric iron was very rare and valuable, and difficult for ancient people to work.

Ex Output:
What was the first man-made alloy used by humans?


Ex Input:
Passage: In the years to follow, public revelations on the state of Charles and Diana's marriage continued. Even though support for republicanism in Britain seemed higher than at any time in living memory, republicanism was still a minority viewpoint, and the Queen herself had high approval ratings. Criticism was focused on the institution of the monarchy itself and the Queen's wider family rather than her own behaviour and actions. In consultation with her husband and the Prime Minister, John Major, as well as the Archbishop of Canterbury, George Carey, and her private secretary, Robert Fellowes, she wrote to Charles and Diana at the end of December 1995, saying that a divorce was desirable.

Ex Output:

What was the majority viewpoint politically in the 1990s in Britain?