Original sentence: Banach successfully colaborated with many of his Ukrainian colleagues both in liberated Lviv, Ukraine, and in the capital of Ukraine, Kyiv.Banach was a member of the National Academy of Science of Ukraine.In 1939-1941 and 1944-1945, when Lviv was liberated from the occupation by Nazi Germany and the dictator-ruled Poland (under the oppressive Pilsudski regime), Banach served as a Chair of the Department of Mathematics at Lviv Ivan Franko National Ukrainian University.Major Banach books were translated from Polish (that Banach was forced to use during the oppressive Pisudski dictatorship in the militarist inter-war Poland) and published by Ukrainian scientists - sometimes, for the first time in a European language.Stefan Banach participated in creation and advancement of the world-famous school of Ukrainian mathematics at Lviv Ivan Franko National Ukrainian University