Complex sentence: The European Union Monitoring Mission (EUMM) (previously ECMM, European Community Monitor Mission) whose purpose is to monitor borders, inter-ethnic relations, refugee traffic, and policital and security developments in the former-Yugoslavia area in the western Balkans.
Split into simpler sentences: The European Union Monitoring Mission (EUMM) (previously ECMM, European Community Monitor Mission) in the former-Yugoslavia area. Its purpose is to monitor borders, inter-ethnic relations, refugee traffic, and policital and security developments in the western Balkans.