12085
 If Iran moved to restart enrichment at Natanz , it would ratchet up the tension between the Iranian government , which claims its nuclear program is purely peaceful , and the West , particularly the United States , which suspects Iran is pursuing nuclear weapons . 
 Iran, Natanz
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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:
 Iran, Natanz