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: What does heat prevent from changing in the crystallization process? 
 disfluent question: How does no make that what does heat prevent from changing in the crystallization process? 
 context: There are three major types of rock: igneous, sedimentary, and metamorphic. The rock cycle is an important concept in geology which illustrates the relationships between these three types of rock, and magma. When a rock crystallizes from melt (magma and/or lava), it is an igneous rock. This rock can be weathered and eroded, and then redeposited and lithified into a sedimentary rock, or be turned into a metamorphic rock due to heat and pressure that change the mineral content of the rock which gives it a characteristic fabric. The sedimentary rock can then be subsequently turned into a metamorphic rock due to heat and pressure and is then weathered, eroded, deposited, and lithified, ultimately becoming a sedimentary rock. Sedimentary rock may also be re-eroded and redeposited, and metamorphic rock may also undergo additional metamorphism. All three types of rocks may be re-melted; when this happens, a new magma is formed, from which an igneous rock may once again crystallize.
Example Output: None

Example Input: proper question: Discovery of gas in the North Sea resulted in what? 
 disfluent question: Discovery of gas in Scotland no the North Sea resulted in what? 
 context: During this time, the discovery of oil in the North Sea and the following It's Scotland's oil campaign of the Scottish National Party (SNP) resulted in rising support for Scottish independence, as well as the SNP. The party argued that the revenues from the oil were not benefitting Scotland as much as they should. The combined effect of these events led to Prime Minister Wilson committing his government to some form of devolved legislature in 1974. However, it was not until 1978 that final legislative proposals for a Scottish Assembly were passed by the United Kingdom Parliament.
Example Output: None

Example Input: proper question: What are buckles facing downwards in a fault called? 
 disfluent question: What are buckles facing downwards in the crust called, I mean buckles in a fault called? 
 context: When rock units are placed under horizontal compression, they shorten and become thicker. Because rock units, other than muds, do not significantly change in volume, this is accomplished in two primary ways: through faulting and folding. In the shallow crust, where brittle deformation can occur, thrust faults form, which cause deeper rock to move on top of shallower rock. Because deeper rock is often older, as noted by the principle of superposition, this can result in older rocks moving on top of younger ones. Movement along faults can result in folding, either because the faults are not planar or because rock layers are dragged along, forming drag folds as slip occurs along the fault. Deeper in the Earth, rocks behave plastically, and fold instead of faulting. These folds can either be those where the material in the center of the fold buckles upwards, creating antiforms, or where it buckles downwards, creating synforms. If the tops of the rock units within the folds remain pointing upwards, they are called anticlines and synclines, respectively. If some of the units in the fold are facing downward, the structure is called an overturned anticline or syncline, and if all of the rock units are overturned or the correct up-direction is unknown, they are simply called by the most general terms, antiforms and synforms.
Example Output:
None

