Complex sentence: The Council of European Municipalities and Regions (CCRE-CEMR) is the largest organisation of local and regional government in Europe; its members are national associations of towns, municipalities and regions from 39 countries.
Split into simpler sentences: The Council of European Municipalities and Regions (CCRE-CEMR) is the largest organisation of local and regional governments in Europe. Its members are national associations of towns, municipalities and regions from 39 countries.