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 On Wednesday , Agence France-Presse reported that the International Atomic Energy Agency investigation of Iran 's nuclear program was still being hampered by unanswered questions about work hidden by Tehran for almost two decades . 
 country capital: Iran, Tehran
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
Answer:
 country capital: Iran, Tehran