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Lt. Gen. Walter E. Buchanan III , the commander of American air forces in the Middle East , said in an interview at his headquarters here that there were really only two enduring bases for the United States in the region : Al Udeid in Qatar and Al Dhafra air base in the United Arab Emirates , from which the Air Force flies U-2 spy planes , the remotely piloted Global Hawk surveillance aircraft , and KC-135 refueling planes .
 location contains: Middle East, Qatar; location contains: Middle East, United Arab Emirates
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
 Entity Pairs:  Middle East, Qatar; Middle East, United Arab Emirates 
Answer:
 location contains: Middle East, Qatar; location contains: Middle East, United Arab Emirates