Original sentence: It is  the sixth most populous city in Iran.Located in the Quru River valley, in Iran's historic Azerbaijan region, between long ridges of volcanic cones in the Sahand and Eynali mountains, Tabriz's elevation ranges between  above sea level.Tabriz () (;  is the most populated city in northwestern Iran, one of the historical capitals of Iran and the present capital of East Azerbaijan province
Edited sentence: Located in the Quru River valley, between long ridges of volcanic cones in the Sahand and Eynali mountains, Tabriz's elevation ranges between  above sea level.Tabriz () (; )  is the most populated city in Iranian Azerbaijan, one of the historical capitals of Iran and the present capital of East Azerbaijan province