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.

Q: proper question: What kind of rock did the hero Siegfried discover? 
 disfluent question: What kind of tribe er rock did the hero Siegfried discover? 
 context: Germanic tribes crossed the Rhine in the Migration period, by the 5th century establishing the kingdoms of Francia on the Lower Rhine, Burgundy on the Upper Rhine and Alemannia on the High Rhine. This Germanic Heroic Age is reflected in medieval legend, such as the Nibelungenlied which tells of the hero Siegfried killing a dragon on the Drachenfels (Siebengebirge) (dragons rock), near Bonn at the Rhine and of the Burgundians and their court at Worms, at the Rhine and Kriemhild's golden treasure, which was thrown into the Rhine by Hagen.

A: None
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Q: proper question: What did families with incomes below $38,000 pay for tuition in 2009? 
 disfluent question: What did families with incomes below $38,000 pay for tuition in 2007, no, 2009? 
 context: For the 2012–13 school year annual tuition was $38,000, with a total cost of attendance of $57,000. Beginning 2007, families with incomes below $60,000 pay nothing for their children to attend, including room and board. Families with incomes between $60,000 to $80,000 pay only a few thousand dollars per year, and families earning between $120,000 and $180,000 pay no more than 10% of their annual incomes. In 2009, Harvard offered grants totaling $414 million across all eleven divisions;[further explanation needed] $340 million came from institutional funds, $35 million from federal support, and $39 million from other outside support. Grants total 88% of Harvard's aid for undergraduate students, with aid also provided by loans (8%) and work-study (4%).

A: None
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Q: proper question: What neighborhood is Edward Harkness formerly from? 
 disfluent question: How many uh never mind what neighborhood is Edward Harkness formerly from? 
 context: Harvard's 209-acre (85 ha) main campus is centered on Harvard Yard in Cambridge, about 3 miles (5 km) west-northwest of the State House in downtown Boston, and extends into the surrounding Harvard Square neighborhood. Harvard Yard itself contains the central administrative offices and main libraries of the university, academic buildings including Sever Hall and University Hall, Memorial Church, and the majority of the freshman dormitories. Sophomore, junior, and senior undergraduates live in twelve residential Houses, nine of which are south of Harvard Yard along or near the Charles River. The other three are located in a residential neighborhood half a mile northwest of the Yard at the Quadrangle (commonly referred to as the Quad), which formerly housed Radcliffe College students until Radcliffe merged its residential system with Harvard. Each residential house contains rooms for undergraduates, House masters, and resident tutors, as well as a dining hall and library. The facilities were made possible by a gift from Yale University alumnus Edward Harkness.

A:
None
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