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 Input:
proper question: What principle helps find the difference between a normal or thrust fault? 
 disfluent question: What fault rather principle helps find the difference between a normal or thrust fault? 
 context: The principle of cross-cutting relationships pertains to the formation of faults and the age of the sequences through which they cut. Faults are younger than the rocks they cut; accordingly, if a fault is found that penetrates some formations but not those on top of it, then the formations that were cut are older than the fault, and the ones that are not cut must be younger than the fault. Finding the key bed in these situations may help determine whether the fault is a normal fault or a thrust fault.

Ex Output:
None


Ex Input:
proper question: What fire left 2000 people homeless? 
 disfluent question: What fire left 1000 people homeless sorry 2000? 
 context: On May 3, 1901, downtown Jacksonville was ravaged by a fire that started as a kitchen fire. Spanish moss at a nearby mattress factory was quickly engulfed in flames and enabling the fire to spread rapidly. In just eight hours, it swept through 146 city blocks, destroyed over 2,000 buildings, left about 10,000 homeless and killed 7 residents. The Confederate Monument in Hemming Park was one of the only landmarks to survive the fire. Governor Jennings declare martial law and sent the state militia to maintain order. On May 17 municipal authority resumed in Jacksonville. It is said the glow from the flames could be seen in Savannah, Georgia, and the smoke plumes seen in Raleigh, North Carolina. Known as the Great Fire of 1901, it was one of the worst disasters in Florida history and the largest urban fire in the southeastern United States. Architect Henry John Klutho was a primary figure in the reconstruction of the city. The first multi-story structure built by Klutho was the Dyal-Upchurch Building in 1902. The St. James Building, built on the previous site of the St. James Hotel that burned down, was built in 1912 as Klutho's crowning achievement.

Ex Output:
None


Ex Input:
proper question: What do bottom-dwelling platyctenids usually lack like the adults? 
 disfluent question: What do bottom-dwelling cydippids usually lack like the adults no I meant bottom-dwelling platyctenids? 
 context: Development of the fertilized eggs is direct, in other words there is no distinctive larval form, and juveniles of all groups generally resemble miniature cydippid adults. In the genus Beroe the juveniles, like the adults, lack tentacles and tentacle sheaths. In most species the juveniles gradually develop the body forms of their parents. In some groups, such as the flat, bottom-dwelling platyctenids, the juveniles behave more like true larvae, as they live among the plankton and thus occupy a different ecological niche from their parents and attain the adult form by a more radical metamorphosis, after dropping to the sea-floor.

Ex Output:

None