Complex sentence: Since the Yugoslav Wars, some borderland territories have been disputed, such as the Island of Vukovar and the Island of Šarengrad; however, this area (also known as Gornja Siga (Upper Tufa)) has remained unclaimed by either side.
Split into simpler sentences: Since the Yugoslav Wars, some borderland territories have been disputed, such as the Island of Vukovar and the Island of Šarengrad. However, this area, also known as Gornja Siga (meaning "upper tufa"), has remained unclaimed by either side.