an Entity references as follows:
USS Catbird (AM-68) was the lead ship of her class of two naval trawlers, which were operated as minesweepers by the United States Navy during World War II. Built in 1938 by Co., Charleston, South Carolina, as MV Bittern, the ship was acquired by the U.S. Navy on 12 August 1940, and commissioned on 27 November 1940.