Complex sentence: However, the history of Ukraine dates back many thousands of years as the territory has been settled continuously since at least 5000 BC and is a candidate site of the origins of the Proto-Indo-European language family.
Split into simpler sentences: However, the history of Ukraine dates back many thousands of years. The territory has been settled continuously since at least 5000 BC and is a candidate site of the origins of the Proto-Indo-European language family.