Complex sentence: His father, Moses ben Asher, is credited with writing the Cairo Codex of the Prophets (895CE); if authentic, it is among the oldest manuscripts containing a large proportion of the Hebrew Bible.
Split into simpler sentences: His father, Moses ben Asher, is credited with writing the Cairo Codex of the Prophets (895 CE). If authentic, it is among the oldest manuscripts containing a large proportion of the Hebrew Bible.