Complex sentence: In 1947 the communist dominated government in Poland estimated war losses at 6.0 million ethnic Poles and Jews, they did not include the losses of Polish citizens from other minorities-Ukrainians and Belarusians.
Split into simpler sentences: In 1947 the communist dominated government in Poland estimated war losses at 6.0 million ethnic Poles and Jews. This report did not include the losses of Polish citizens from other minorities-Ukrainians and Belarusians.