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: Static analysis techniques for software verification can be applied also in the scenario of query languages. In particular, the *Abstract interpretation framework has been extended to the field of query languages for relational databases as a way to support sound approximation techniques. The semantics of query languages can be tuned according to suitable abstractions of the concrete domain of data. The abstraction of relational database system has many interesting applications, in particular, for security purposes, such as fine grained access control, watermarking, etc.

Ex Output:
Why is static analysis impossible with query languages?


Ex Input:
Passage: The oak forests of the southern and central Appalachians consist largely of black, northern red, white, chestnut and scarlet oaks (Quercus velutina, Q. rubra, Q. alba, Q. prinus and Q. coccinea) and hickories, such as the pignut (Carya glabra) in particular. The richest forests, which grade into mesic types, usually in coves and on gentle slopes, have dominantly white and northern red oaks, while the driest sites are dominated by chestnut oak, or sometimes by scarlet or northern red oaks. In the northern Appalachians the oaks, except for white and northern red, drop out, while the latter extends farthest north.

Ex Output:
What is the dominate type of oak in the Appalachians?


Ex Input:
Passage: In 1996, Turner Broadcasting System merged with Time Warner, which besides placing Turner Classic Movies and Warner Bros. Entertainment under the same corporate umbrella, also gave TCM access to Warner Bros.' library of films released after 1949 (which itself includes other acquired entities such as the Lorimar, Saul Zaentz and National General Pictures libraries); incidentally, TCM had already been running select Warner Bros. film titles through a licensing agreement with the studio that was signed prior to the launch of the channel. In March 1999, MGM paid Warner Bros. and gave up the home video rights to the MGM/UA films owned by Turner to Warner Home Video.

Ex Output:

With what company did Turner Broadcasting Systems merge in 1999?