呢個句子嘅複雜版本 卡內姆 - 博爾努帝國同索科托哈里發國係尼日利亞北部嘅主要歷史伊斯蘭國家
當然,呢個句子嘅複雜版本係 "Kanem-Bornu Empire and the Sokoto Caliphate were major historical Islamic states in northern Nigeria which were strong states with strong kings who held an advanced legal and taxation systems, with religion serving to legitimize the power of the king and to unite the people". 卡內姆-博努帝國同索科托哈里發國係尼日利亞北部嘅主要歷史伊斯蘭國家,