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Then on Thursday , President Mahmoud Ahmadinejad said that Tehran was '' presently conducting research '' on the P-2 centrifuge , boasting that it would quadruple Iran 's enrichment powers .
 location contains: Iran, Tehran; nationality: Mahmoud Ahmadinejad, Iran; country of capital: Iran, Tehran
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:  Iran, Tehran; Mahmoud Ahmadinejad, Iran; Iran, Tehran 
Answer:
 location contains: Iran, Tehran; nationality: Mahmoud Ahmadinejad, Iran; country of capital: Iran, Tehran