Input (grade 13): Dian Fossey (daÉ Ë Ã n Ë fÉ's i, January 16, 1932 â "December 26, 1985) was an American zoologist who undertook an extensive study of gorilla groups over a period of 18 years.
Output (grade 12): Dian Fossey (January 16, 1932 - December 26, 1985) was an American zoologist.