Definition: In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: How long did the operation last in which Post was stationed at an air base in Qatar? Passage:From July 1996 to May 1997, Post was a student at the Army Command and General Staff College at Fort Leavenworth, Kansas. He was then posted to The Pentagon in Washington, DC, as Operations Officer, Western Hemisphere, Operations Directorate (J3) in June 1997. He graduated from the Armed Forces Staff College in 1998. In July and August 1999, completed the F-16 transition course at Luke Air Force Base in Arizona. He was an F-16 Evaluation Pilot with the 77th Fighter Squadron, Operations Officer with the 79th Fighter Squadron, and then commander of the 55th Fighter Squadron, all at Shaw Air Force Base in South Carolina. From July 2002 to June 2003, he was a student at the Air War College at Maxwell Air Force Base, earning a Master of Strategic Studies degree. He was Senior Deputy Commander of the 56th Operations Group at Luke Air Force Base from July 2003 to March 2004, and Vice Commander of the 388th Fighter Wing at Hill Air Force Base in Utah from April 2004 to July 2006. He was in charge of Standardization and Evaluation with the Twelfth Air Force at Davis-Monthan Air Force Base in Arizona from August 2006 to January 2007. He commanded the 20th Fighter Wing at Shaw Air Force Base from February 2007 to October 2008, and then the 609th Air and Space Operations Center at Al Udeid Air Base in Qatar in support of Operation Iraqi Freedom. He flew 280 combat sorties. From August 2009 until January 2010, he was Director of Plans and Requirements at Headquarters, Twelfth Air Force. From February 2010 to August 2012, he was commander of the 354th Fighter Wing at Eielson Air Force Base in Alaska.


a