Complex sentence: Small deposits of rare earth elements are known in central and southern parts of the country, the biggest being Dyjabazavaye (Diabazovoye; in Zhytkavichy Raion), containing beryllium and rare earth elements.
Split into simpler sentences: Small deposits of rare earth elements are known in central and southern parts of the country. The biggest one is Dyjabazavaye (Diabazovoye; in Zhytkavichy Raion), containing beryllium and rare earth elements.