Complex sentence: During the revolt of the Zenata tribe of the Ifranides, they proclaimed Caliph their leader Abu Qurra, who settled in Tlemcen, the creation of this city is attributed to Ifranides, but the site was already occupied by the Roman city of Pomaria.
Split into simpler sentences: During the revolt of the Zenata tribe of the Ifranides, they proclaimed their leader Abu Qurra Caliph, and he settled in Tlemcen. The creation of this city is attributed to Ifranides, but the site was already occupied by the Roman city of Pomaria.