Complex sentence: As early as the sixth century, the Bulgars brought the short-necked variety of the instrument called Komuz to the Balkans, and in the ninth century, Moors also brought the oud to Spain.
Split into simpler sentences: As early as the sixth century, the Bulgars brought the short-necked variety of the instrument called Komuz to the Balkans. In the ninth century, Moors also brought the oud to Spain.