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.
One 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.
Solution is here: 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.

Now, solve this: proper question: What did Conant develop to attract wealthy students to the school in 1933?
disfluent question: What did Conant guarantee preeminence among research in institutions no no develop to attract wealthy students to the school in 1933?
context: James Bryant Conant (president, 19331953) reinvigorated creative scholarship to guarantee its preeminence among research institutions. He saw higher education as a vehicle of opportunity for the talented rather than an entitlement for the wealthy, so Conant devised programs to identify, recruit, and support talented youth. In 1943, he asked the faculty make a definitive statement about what general education ought to be, at the secondary as well as the college level. The resulting Report, published in 1945, was one of the most influential manifestos in the history of American education in the 20th century.
Solution:
None