Assertion: caliph | /r/CapableOf | have for decade
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Source sentences:
text: The most influential of these, the Ahkam al-sultaniyya of the Shafi˓i jurist al-Mawardi (d. 1058), was written in the later Buyid period, when the caliphs had for decades lived in often humiliating circumstances under the tutelage of their military overlords.