Original sentence: By 1959 Poles made up only 4% of the population after Ukrainians, Russians and Jews.During Soviet times two Polish schools continued to function: № 10 (with 8 grades) and № 24 (with 10 grades).It became a major Polish cultural centre and this continued after the partitions of Poland.The Polish population underwent significant assimilation; in 1989 40% considered Ukrainian as their mother tongue, 15% Russian.Those that remained found themselves having lost their state status and becoming an ethnic minority
Edited sentence: As a result, 45 years after the end of WWII, in 1989, for 1000 female Poles there were 600 male Poles.As a result, the Poles that remained tended to be those of the lower classes and had lower education than those of the other ethnicities in the city.During Soviet times, two Polish schools continued to function: № 10 (with 8 grades) and № 24 (with 10 grades), and two Roman Catholic Cathedrals continued to function.During the events of 1918–1920 Polish patriotism in Lviv was at its height with the formation of the Polish Eaglets.It became a major Polish cultural centre, and this continued after the partitions of Poland.Many families were mixed.The city was abandoned by government, cultural, academic, technical intelligentsia, military and highly qualified workers.Those that remained found themselves in uncomfortable surroundings, having lost their state status and becoming an ethnic minority, which in 1959 only made up 4% of the population after Ukrainians, Russians and Jews.and the Polish population underwent significant assimilation; in 1989 40% considered Ukrainian as their mother tongue, 15% Russian