Task: Text Categorization
Input (English): Text:  The Boston Navy Yard originally called the Charlestown Navy Yard and later Boston Naval Shipyard was one of the oldest shipbuilding facilities in the United States Navy. Established in 1801 it was officially closed as an active naval installation on July 1 1974 and the 30-acre (120000 m2) property was transferred to the National Park Service to be part of Boston National Historical Park. Enough of the yard remains in operation to support the USS Constitution.
Output (English): 7