Complex sentence: Both versions of the "Bayán" were incomplete; the "Persian Bayán" had 9 unities and 10 chapters, with the "Arabic Bayán" having 11 unities.
Split into simpler sentences: Both versions of the "Bayán" were incomplete. The "Persian Bayán" had 9 unities and 10 chapters, with the "Arabic Bayán" having 11 unities.