Complex sentence: M.I.Rostovtsev-Prohorovo culture-mounds dated IV-III centuries, BC, and linked with the eastern neighbors of the Scythians-Sarmatians (Sauromates-Sarmatian community).
Split into simpler sentences: M.I.Rostovtsev-Prohorovo culture-mounds dated IV-III centuries. BC and linked with the eastern neighbors of the Scythians-Sarmatians (Sauromates-Sarmatian community).