Complex sentence: They subsequently made an equivalent request to Shimun XXI Benyamin, Patriarch of the Assyrian Church of the East in Qochanis who consented, dispatching Bishop Abimelek to serve as their metropolitan bishop.
Split into simpler sentences: They subsequently made an equivalent request to Shimun XXI Benyamin, Patriarch of the Assyrian Church of the East in Qochanis. Simon consented, and dispatched Abimelek to serve as their metropolitan bishop.