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.

Let me give you an 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.
The answer to this example can be: None
Here is why: 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.

OK. solve this:
proper question: What are some of the minor factors in the local economy?
disfluent question: What are some of the major no minor factors in the local economy?
context: Harbor improvements since the late 19th century have made Jacksonville a major military and civilian deep-water port. Its riverine location facilitates two United States Navy bases and the Port of Jacksonville, Florida's third largest seaport. The two US Navy bases, Blount Island Command and the nearby Naval Submarine Base Kings Bay form the third largest military presence in the United States. Significant factors in the local economy include services such as banking, insurance, healthcare and logistics. As with much of Florida, tourism is also important to the Jacksonville area, particularly tourism related to golf. People from Jacksonville may be called Jacksonvillians or Jaxsons (also spelled Jaxons).
Answer:
None