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.

Input: Consider Input: Passage: Subsequently, in October 2001, U.S. forces (with UK and coalition allies) invaded Afghanistan to oust the Taliban regime. On 7 October 2001, the official invasion began with British and U.S. forces conducting airstrike campaigns over enemy targets. Kabul, the capital city of Afghanistan, fell by mid-November. The remaining al-Qaeda and Taliban remnants fell back to the rugged mountains of eastern Afghanistan, mainly Tora Bora. In December, Coalition forces (the U.S. and its allies) fought within that region. It is believed that Osama bin Laden escaped into Pakistan during the battle.

Output: What city fell by mid-October in the invasion of Afghanistan? 


Input: Consider Input: Passage: According to figures from Britain's Radio Manufacturers Association, 18,999 television sets had been manufactured from 1936 to September 1939, when production was halted by the war.

Output: How many television sets had been manufactured by 1939?


Input: Consider Input: Passage: Although the structural model provided by the University of Paris, where student members are controlled by faculty "masters," provided a standard for universities, the application of this model took at least three different forms. There were universities that had a system of faculties whose teaching addressed a very specific curriculum; this model tended to train specialists. There was a collegiate or tutorial model based on the system at University of Oxford where teaching and organization was decentralized and knowledge was more of a generalist nature. There were also universities that combined these models, using the collegiate model but having a centralized organization.


Output: What student run university provided the standard for other universities?