Original sentence: Afterwards he focused his action on Salonica's Jewish community, and participated in a splinter group that--with help from Papanastassiou, then Prime Minister--tried unsuccessfully to split the Communist Party.In Salonica he had a difficult life, especially after the Liberals' nationalist turn, by the end of the 1920s, and the repeated coups d' État of 1935 that destroyed the Republic as well as the hopes of the democratic left
Edited sentence: Afterwards he focused his action on Thessaloniki's Jewish community, and participated in a splinter group that--with help from Papanastassiou, then Prime Minister--tried unsuccessfully to split the Communist Party.In Thessaloniki he had a difficult life, especially after the Liberals' nationalist turn, by the end of the 1920s, and the repeated coups d' État of 1935 that destroyed the Republic as well as the hopes of the democratic left