. "American opera singer" . "1938Z"^^ . "1960Z"^^ . . . . . "1909-10-08Z"^^ . "Harrell, Mack"@en . . . . . . "1909Z"^^ . . . "1960Z"^^ . "1909-10-09Z"^^ . "Mack Harrell"@en . . "Mack Kendree Harrell, Jr. (8 October 1909 Celeste, Texas \u2014 29 January 1960 Dallas, Texas) was an American operatic and concert baritone vocalist who was regarded as one of the greatest American-born lieder singers of his generation."@en . . . "Mack Kendree Harrell, Jr."@en . "solo_singer" . . . "1960-01-29Z"^^ . . . .