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This US state is home to the Rosetta Stone Concord Office, and Lake Webster, also known by a name derived from its Nipmuc (Algonquin) name,
Chargoggagoggmanchauggagoggchaubunagungamaugg, which has been said to mean "You fish on your side of the lake, we'll fish on our side of the lake, and nobody fishes in the middle."
What is Massachusetts?