Complex sentence: Alfred Ploetz (March 22,1860--March 20,1940) was a German physician, biologist, eugenicist known for introducing racial hygiene ("Rassenhygiene").
Split into simpler sentences: Alfred Ploetz (March 22,1860--March 20,1940) German physician, biologist, eugenicist. Known for introducing racial hygiene ("Rassenhygiene").