Original sentence: The duchy later expanded to include large portions of the former Kievan Rus' and other Slavic lands, covering the territory of present-day Belarus, Lithuania, Ukraine, Transnistria, Latvia and parts of Poland and Russia
Edited sentence: The duchy later expanded to include large portions of the former Kievan Rus' and other Slavic lands, covering the territory of present-day Lithuania, Belarus, Ukraine, Transnistria, Latvia and parts of Poland and Russia