Complex sentence: John ibn Jowey an-Nubi (d.10 October 680) was the black Christian slave of the early Muslim leader Husayn ibn Ali who fought willingly for him in the Battle of Karbala and like all of Husayn's soldiers, was killed.
Split into simpler sentences: John ibn Jowey an-Nubi (d.10 October 680) was the black Christian slave of the early Muslim leader Husayn ibn Ali. He fought willingly for him in the Battle of Karbala and like all of Husayn's soldiers, was killed.