Complex sentence: The work is ascribed to Joseph ben Gorion (יוסף בן גוריון), a Jew living in southern Italy in either the 9th or the 10th century.
Split into simpler sentences: The work is ascribed to a certain Joseph ben Gorion (יוסף בן גוריון). It is generally held that he was a Jew living in southern Italy in either the 9th or the 10th century.