"About this sound Paul Ehrlich (14 March 1854 \u2013 20 August 1915) was a German physician and scientist who worked in the fields of hematology, immunology, and antimicrobial chemotherapy. He invented the precursor technique to Gram staining bacteria."@en . . . . . "1854Z"^^ . . . "Paul Ehrlich"@en . "1915-08-20Z"^^ . . . "1854-03-14Z"^^ . . . "1915Z"^^ . "German biologist" . . "Ehrlich, Paul"@en .