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.

Example input: 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.
Example output: None
Example 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.
Q: proper question: Friedrich Ratzel thought what was not needed for a state to survive? 
 disfluent question: J. A. Hobson sorry no Friedrich Ratzel thought what was not needed for a state to survive? 
 context: A controversial aspect of imperialism is the defense and justification of empire-building based on seemingly rational grounds. J. A. Hobson identifies this justification on general grounds as: It is desirable that the earth should be peopled, governed, and developed, as far as possible, by the races which can do this work best, i.e. by the races of highest 'social efficiency'. Many others argued that imperialism is justified for several different reasons. Friedrich Ratzel believed that in order for a state to survive, imperialism was needed. Halford Mackinder felt that Great Britain needed to be one of the greatest imperialists and therefore justified imperialism. The purportedly scientific nature of Social Darwinism and a theory of races formed a supposedly rational justification for imperialism. The rhetoric of colonizers being racially superior appears to have achieved its purpose, for example throughout Latin America whiteness is still prized today and various forms of blanqueamiento (whitening) are common.
A:
None