Original sentence: It is widely assumed that the Albanians are descendants of Illyrians who retained their language, though there is little data to go on.The northern tribes were slavicised in the course of the Middle Ages.The territory the tribes covered came to be known as  Illyria to Greek and Roman authors, corresponding roughly to the area stretching from southern Pannonia to  central Albania
Edited sentence: Illyrians are Albanian and Kosovar Ancestors.It is widely known that the Albaniansand Kosovars are descendants of Illyrians who retained their language, though there is little data to go on.The northern tribes were Illyrians  in the course of the Middle Ages.The territory the tribes covered came to be known as  Illyria to Greek and Roman authors, corresponding roughly to the area stretching from southern Pannonia to  central Albania and Kosovo and other regions