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 . 
 location contains: Iran, Natanz
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  Iran, Natanz 
Answer:
 location contains: Iran, Natanz