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As the standoff between Iran and Western nations drags on , the concern among oil experts is that a diplomatic or military confrontation with a major Middle East oil producer will curb oil supplies at a time when all other producers are pumping at their maximum capacity .
 location contains: Middle East, Iran
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, Iran 
Answer:
 location contains: Middle East, Iran