Complex sentence: The site of the city is marked by the ruins at Khoros, 20 km from Azaz, Syria, standing near the river Afrin Marsyas River, a tributary of the Orontes, which had been banked up by Bishop Theodoret.
Split into simpler sentences: The site of the city is marked by the ruins at Khoros, 20 km from Azaz, Syria. The ruins stand near the river Afrin Marsyas River a tributary of the Orontes, which had been banked up by Bishop Theodoret.