instruction:
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.
question:
proper question: What did using fossils help change for scientists?
disfluent question: How umm rather what did using fossils help change for scientists?
context: At the beginning of the 20th century, important advancement in geological science was facilitated by the ability to obtain accurate absolute dates to geologic events using radioactive isotopes and other methods. This changed the understanding of geologic time. Previously, geologists could only use fossils and stratigraphic correlation to date sections of rock relative to one another. With isotopic dates it became possible to assign absolute ages to rock units, and these absolute dates could be applied to fossil sequences in which there was datable material, converting the old relative ages into new absolute ages.
answer:
None

question:
proper question: During what word was Jacksonville a key supply point for the North?
disfluent question: During what word was Jacksonville a key supply point for the south no I meant the North?
context: During the American Civil War, Jacksonville was a key supply point for hogs and cattle being shipped from Florida to aid the Confederate cause. The city was blockaded by Union forces, who gained control of the nearby Fort Clinch. Though no battles were fought in Jacksonville proper, the city changed hands several times between Union and Confederate forces. The Skirmish of the Brick Church in 1862 just outside Jacksonville proper resulted in the first Confederate victory in Florida. In February 1864 Union forces left Jacksonville and confronted a Confederate Army at the Battle of Olustee resulting in a Confederate victory. Union forces then retreated to Jacksonville and held the city for the remainder of the war. In March 1864 a Confederate cavalry confronted a Union expedition resulting in the Battle of Cedar Creek. Warfare and the long occupation left the city disrupted after the war.
answer:
None

question:
proper question: When was Middle and Western Francia formed?
disfluent question: How was or no rather when was Middle and Western Francia formed?
context: By the 6th century, the Rhine was within the borders of Francia. In the 9th, it formed part of the border between Middle and Western Francia, but in the 10th century, it was fully within the Holy Roman Empire, flowing through Swabia, Franconia and Lower Lorraine. The mouths of the Rhine, in the county of Holland, fell to the Burgundian Netherlands in the 15th century; Holland remained contentious territory throughout the European wars of religion and the eventual collapse of the Holy Roman Empire, when the length of the Rhine fell to the First French Empire and its client states. The Alsace on the left banks of the Upper Rhine was sold to Burgundy by Archduke Sigismund of Austria in 1469 and eventually fell to France in the Thirty Years' War. The numerous historic castles in Rhineland-Palatinate attest to the importance of the river as a commercial route.
answer:
None