"Mac Morgan (June 25, 1917 \u2013 June 12, 2007) was an American bass-baritone who had an active performance career in concerts and operas from the early 1940s until the mid-1970s. The Boston Globe described him as a singer \"known for his rich tone and enviable diction\". After retiring from the stage, he embarked on a second successful career as a voice teacher."@en . . "American bass-baritone" . "2007-06-12Z"^^ . "Morgan, Mac"@en . "1917-06-25Z"^^ . "2007Z"^^ . . "1917Z"^^ .