. . "British academic" . "Lionel Sharples Penrose, FRS (11 June 1898 \u2013 12 May 1972) was a British psychiatrist, medical geneticist, mathematician and chess theorist, who carried out pioneering work on the genetics of mental retardation."@en . . "1972Z"^^ . "1898Z"^^ . . "1972-05-12Z"^^ . "Penrose, Lionel"@en . . . . "Lionel Sharples Penrose"@en . "1898-06-11Z"^^ . .