Complex sentence: Several competing theories have been proposed to explain the origin of modern Romanians, but linguistic and geo-historical analysis tend to indicate that Romanians coalesced as a major ethnic group both North and South of the lower Danube in the regions previously colonized by Romans.
Split into simpler sentences: Several competing theories have been proposed to explain the origin of modern Romanians. Linguistic and geo-historical analysis tend to indicate that Romanians coalesced as a major ethnic group both south and north of the Danube in the regions previously colonized by Romans.