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 happens as they build phase 1?
disfluent question: What happens as they build phase 2 or I guess phase 1 not 2?
context: The owner produces a list of requirements for a project, giving an overall view of the project's goals. Several D&B contractors present different ideas about how to accomplish these goals. The owner selects the ideas he or she likes best and hires the appropriate contractor. Often, it is not just one contractor, but a consortium of several contractors working together. Once these have been hired, they begin building the first phase of the project. As they build phase 1, they design phase 2. This is in contrast to a design-bid-build contract, where the project is completely designed by the owner, then bid on, then completed.

Ex Output:
they design phase 2

Ex Input:
proper question: What was the fort that was being destroyed to be named?
disfluent question: How many, no let me ask; what was the fort that was being destroyed to be named?
context: Even before Washington returned, Dinwiddie had sent a company of 40 men under William Trent to that point, where in the early months of 1754 they began construction of a small stockaded fort. Governor Duquesne sent additional French forces under Claude-Pierre Pecaudy de Contrecur to relieve Saint-Pierre during the same period, and Contrecur led 500 men south from Fort Venango on April 5, 1754. When these forces arrived at the fort on April 16, Contrecur generously allowed Trent's small company to withdraw. He purchased their construction tools to continue building what became Fort Duquesne.

Ex Output:
None

Ex Input:
proper question: What did Charles Darwin successfully promote?
disfluent question: What did Charles Darwin successfully publicize um rather promote?
context: Sir Charles Lyell first published his famous book, Principles of Geology, in 1830. This book, which influenced the thought of Charles Darwin, successfully promoted the doctrine of uniformitarianism. This theory states that slow geological processes have occurred throughout the Earth's history and are still occurring today. In contrast, catastrophism is the theory that Earth's features formed in single, catastrophic events and remained unchanged thereafter. Though Hutton believed in uniformitarianism, the idea was not widely accepted at the time.

Ex Output:
None