Complex sentence: Only ten are traditionally listed, hence the era's name, "Ten Kingdoms"; some historians, such as Bo Yang, count eleven, including Yan and Qi but not the Northern Han, viewing it as simply a continuation of Later Han.
Split into simpler sentences: Only ten are traditionally listed, hence the era's name. Some historians, such as Bo Yang, count eleven, including Yan and Qi but not the Northern Han, viewing it as simply a continuation of Later Han.