. "Peirce, Benjamin"@en . . . "1809Z"^^ . . "1880-10-06Z"^^ . . "American mathematician" . . . . . "Benjamin Peirce"@en . "1880Z"^^ . "1809-04-04Z"^^ . . "Benjamin Peirce (/\u02C8p\u025Crs/; April 4, 1809 \u2013 October 6, 1880) was an American mathematician who taught at Harvard University for approximately 50 years."@en . . . .