Question: The Sudbury Reservoir, is an emergency backup Boston metropolitan water reservoir located in Framingham, a town in the Commonwealth of Massachusetts, in which country?
Sentence (from "Chestnut Hill Reservoir Historic District"): The district is nearly coextensive with the Chestnut Hill Reservation, a state park managed by the Massachusetts Department of Conservation and Recreation (DCR); those elements of the water works that are still required as an emergency backup are managed by the Massachusetts Water Resources Authority (MWRA).
Relevant evidence: No