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.

Example Input: Passage: In the late 19th century with the discovery of the electron, and in the early 20th century, with the discovery of the atomic nucleus, and the birth of particle physics, matter was seen as made up of electrons, protons and neutrons interacting to form atoms. Today, we know that even protons and neutrons are not indivisible, they can be divided into quarks, while electrons are part of a particle family called leptons. Both quarks and leptons are elementary particles, and are currently seen as being the fundamental constituents of matter.
Example Output: What field of physics began in the 19th century?

Example Input: Passage: The U.S. Army currently consists of 10 active divisions as well as several independent units. The force is in the process of contracting after several years of growth. In June 2013, the Army announced plans to downsize to 32 active combat brigade teams by 2015 to match a reduction in active duty strength to 490,000 soldiers. Army Chief of Staff Raymond Odierno has projected that by 2018 the Army will eventually shrink to "450,000 in the active component, 335,000 in the National Guard and 195,000 in U.S. Army Reserve."
Example Output: How many divisions are there in the U.S. Navy?

Example Input: Passage: In the 2005 OECD report for Greece, it was clearly stated that "the impact of new accounting rules on the fiscal figures for the years 1997 to 1999 ranged from 0.7 to 1 percentage point of GDP; this retroactive change of methodology was responsible for the revised deficit exceeding 3% in 1999, the year of [Greece's] EMU membership qualification". The above led the Greek minister of finance to clarify that the 1999 budget deficit was below the prescribed 3% limit when calculated with the ESA79 methodology in force at the time of Greece's application, and thus the criteria had been met.
Example Output:
Who burned a report for Greece in 2005?