Question: United States Forces – Iraq (USF-I) was an American military sub-unified command, part of U.S. Central Command, General Lloyd Austin served as Commanding General, he was the which number commander of United States Central Command (CENTCOM)? 
Sentence (from "United States Forces – Iraq"): It was stationed in Iraq as agreed with the Government of Iraq under the U.S.–Iraq Status of Forces Agreement.
Relevant evidence: No