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.

[EX Q]: proper question: What news magazine transitioned to being exclusively online in 2009? 
 disfluent question: What news magazine transitioned to being exclusively online in 2011 er uh 2009? 
 context: Harvard has been highly ranked by many university rankings. In particular, it has consistently topped the Academic Ranking of World Universities (ARWU) since 2003, and the THE World Reputation Rankings since 2011, when the first time such league tables were published. When the QS and Times were published in partnership as the THE-QS World University Rankings during 2004-2009, Harvard had also been regarded the first in every year. The University's undergraduate program has been continuously among the top two in the U.S. News & World Report. In 2014, Harvard topped the University Ranking by Academic Performance (URAP). It was ranked 8th on the 2013-2014 PayScale College Salary Report and 14th on the 2013 PayScale College Education Value Rankings. From a poll done by The Princeton Review, Harvard is the second most commonly named dream college, both for students and parents in 2013, and was the first nominated by parents in 2009. In 2011, the Mines ParisTech : Professional Ranking World Universities ranked Harvard 1st university in the world in terms of number of alumni holding CEO position in Fortune Global 500 companies.
[EX A]: None

[EX Q]: proper question: The city of Pritzker is home to which University? 
 disfluent question: The city of Pritzker is home to which school no no University? 
 context: The University of Chicago (UChicago, Chicago, or U of C) is a private research university in Chicago. The university, established in 1890, consists of The College, various graduate programs, interdisciplinary committees organized into four academic research divisions and seven professional schools. Beyond the arts and sciences, Chicago is also well known for its professional schools, which include the Pritzker School of Medicine, the University of Chicago Booth School of Business, the Law School, the School of Social Service Administration, the Harris School of Public Policy Studies, the Graham School of Continuing Liberal and Professional Studies and the Divinity School. The university currently enrolls approximately 5,000 students in the College and around 15,000 students overall.
[EX A]: None

[EX Q]: proper question: What modern math concept did Zhu Shijie do work different from? 
 disfluent question: What modern math concept did Pascal or no make that did Zhu Shijie do work different from? 
 context: Advances in polynomial algebra were made by mathematicians during the Yuan era. The mathematician Zhu Shijie (1249–1314) solved simultaneous equations with up to four unknowns using a rectangular array of coefficients, equivalent to modern matrices. Zhu used a method of elimination to reduce the simultaneous equations to a single equation with only one unknown. His method is described in the Jade Mirror of the Four Unknowns, written in 1303. The opening pages contain a diagram of Pascal's triangle. The summation of a finite arithmetic series is also covered in the book.
[EX A]:
None