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There is more than one place called '''Portsmouth''':
Portsmouth (Dominica) - A city on the island of Dominica in the Caribbean.
Portsmouth - A waterfront city in England that is well known for its naval history and the Spinnaker Tower.
Portsmouth (New Hampshire) - A city in the state of New Hampshire.
Portsmouth (Ohio) - A city in Ohio.
Portsmouth (Virginia) - A city in the state of Virginia.
Portsmouth (Rhode Island) - A town in Rhode Island.