Detailed Instructions: Use a disfluent question or a proper question and find the answer to the question based on the given context or return None if an answer can't be found. A disfluent question is a question that has some interruptions in it while framing. A proper question is the correct form of the question without any disfluency.
See one example below:
Problem: proper question: In what year did the U of C become one of 7 founding members of the Association of Chicago Universities? 
 disfluent question: In what year did Robert Harper or did the U of C become one of 7 founding members of the Association of Chicago Universities? 
 context: Founded by the American Baptist Education Society with a donation from oil magnate and wealthiest man in history John D. Rockefeller, the University of Chicago was incorporated in 1890; William Rainey Harper became the university's first president in 1891, and the first classes were held in 1892. Both Harper and future president Robert Maynard Hutchins advocated for Chicago's curriculum to be based upon theoretical and perennial issues rather than on applied sciences and commercial utility. With Harper's vision in mind, the University of Chicago also became one of the 14 founding members of the Association of American Universities, an international organization of leading research universities, in 1900.
Solution: None
Explanation: The answer to the above question is not found from the context hence it is not answerable so the output is 'None' so it is a positive example.

Problem: proper question: Student enrollment increased as a result of increased crime and poverty in which neighborhood? 
 disfluent question: What happened no Student enrollment increased as a result of increased crime and poverty in which neighborhood? 
 context: In the early 1950s, student applications declined as a result of increasing crime and poverty in the Hyde Park neighborhood. In response, the university became a major sponsor of a controversial urban renewal project for Hyde Park, which profoundly affected both the neighborhood's architecture and street plan. During this period the university, like Shimer College and 10 others, adopted an early entrant program that allowed very young students to attend college; in addition, students enrolled at Shimer were enabled to transfer automatically to the University of Chicago after their second year, having taken comparable or identical examinations and courses.
Solution:
None