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: 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 solution: 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.

Problem: proper question: Who besides the british colonized Asia? 
 disfluent question: What did or tell me who besides the british colonized Asia? 
 context: To better illustrate this idea, Bassett focuses his analysis of the role of nineteenth-century maps during the scramble for Africa. He states that maps contributed to empire by promoting, assisting, and legitimizing the extension of French and British power into West Africa. During his analysis of nineteenth-century cartographic techniques, he highlights the use of blank space to denote unknown or unexplored territory. This provided incentives for imperial and colonial powers to obtain information to fill in blank spaces on contemporary maps.

Solution: None