Question: What is the name given to a number of elongated iron-ore mining districts around Lake Superior whose cities are known for their architecturally distinctive residences?
Sentence (from "Lake Superior Chippewa"): The Lake Superior Chippewa (Anishinaabe: Gichigamiwininiwag) were a large historical band of Ojibwe (Anishinaabe) Indians living around Lake Superior; this territory is considered part of northern Michigan, Wisconsin, and Minnesota in the United States.
Relevant evidence: No