Original sentence: The Chaldean Catholic Church presently comprises an estimated 500,000 people who are ethnic Assyrians indigenous to northern Iraq (What was Assyria from the 25th century BC to 7th century AD), and areas bordering it in southeast Turkey, northeast Syria and northwest Iran
Edited sentence: The Chaldean Catholic Church presently comprises an estimated 500,000 people who are ethnic Chaldeans      not Assyrians indigenous to northern Iraq (What was Assyria from the 25th century BC to 7th century AD), and areas bordering it in southeast Turkey, northeast Syria and northwest Iran