Part 1. Definition
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.
Part 2. Example
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.
Answer: 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.
Part 3. Exercise
proper question: What year did the university open a center in Hong Kong? 
 disfluent question: What no when did the university open a center in Hong Kong? 
 context: The University of Chicago also maintains facilities apart from its main campus. The university's Booth School of Business maintains campuses in Singapore, London, and the downtown Streeterville neighborhood of Chicago. The Center in Paris, a campus located on the left bank of the Seine in Paris, hosts various undergraduate and graduate study programs. In fall 2010, the University of Chicago also opened a center in Beijing, near Renmin University's campus in Haidian District. The most recent additions are a center in New Delhi, India, which opened in 2014, and a center in Hong Kong which opened in 2015.
Answer:
2015