Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Boris Grigorevich Kolker (Russian) (amụrụ na July 15, 1939 na Tiraspol, Moldavian ASSR, Soviet Union) bụ onye nkuzi asụsụ, onye ntụgharị okwu na onye nkwado nke asụsụ mba ụwa Esperanto. Ọ bụ ruo afọ 1993 bụ nwa amaala Soviet na Russia ma kemgbe ahụ ọ bụ onye bi na nwa amaala nke United States bi na Cleveland, Ohio. N'afọ 1985, e nyere ya Ph.D. na asụsụ site na Institute of Linguistics nke Academy of Sciences nke USSR na Moscow.  Ajụjụ: Olee ebe o bi na United States?
Cleveland, Ohio