Question: Katharine "Kate" Thatcher Clugston, was a playwright, poet, and English teacher, and passed away on Chebeague Island, an island town in Cumberland County, Maine, in which country?
Sentence (from "Chebeague Island, Maine"): Chebeague Island is an island town in Cumberland County, Maine, United States, located in Casco Bay, 10 mi from Portland.
Relevant evidence: Yes