. . "William \"Big Bill\" Morganfield (born June 19, 1956) is an American blues singer and guitarist, who is the son of Muddy Waters."@en . . . "Big Bill Morganfield"@en . . "Americanbluessinger andguitarist" . "1956Z"^^ . . . . "William Morganfield"@en . . "solo_singer" . . "1990Z"^^ . . . . . . "Morganfield, Big Bill"@en . . . . "1956-06-19Z"^^ .