13474
France , Germany and Britain announced after the collapse of their 2004 agreement with Iran to freeze its nuclear-related activities that they would be willing to engage in new talks only if Iran returned to a complete freeze of uranium enrichment at Natanz .
 location contains: Iran, Natanz; 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: 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, Natanz; Iran, Natanz 
Answer:
 location contains: Iran, Natanz; location contains: Iran, Natanz