Complex sentence: In his youth Ibnu Sahnun studied under the scholars of Qayrawan and Tunis; in particular he learned from 'Ali bin Ziyad, who had learned from Imam Malik.
Split into simpler sentences: In his youth Ibnu Sahnun studied under the scholars of Qayrawan and Tunis. In particular, he learned from 'Ali bin Ziyad, who had learned from Imam Malik.