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 wasn't extent of Celeron's expedition?
disfluent question: What wasn't extent of Celeron's business, sorry, expedition?
context: Celoron's expedition force consisted of about 200 Troupes de la marine and 30 Indians. The expedition covered about 3,000 miles (4,800 km) between June and November 1749. It went up the St. Lawrence, continued along the northern shore of Lake Ontario, crossed the portage at Niagara, and followed the southern shore of Lake Erie. At the Chautauqua Portage (near present-day Barcelona, New York), the expedition moved inland to the Allegheny River, which it followed to the site of present-day Pittsburgh. There Celoron buried lead plates engraved with the French claim to the Ohio Country. Whenever he encountered British merchants or fur-traders, Celoron informed them of the French claims on the territory and told them to leave.
A:
None