18220
Objections from West African nations over the American cotton subsidies , together with others from Botswana over talks on streamlining customs procedures , brought negotiations to a standstill at the most recent W.T.O. ministerial conference two years ago in Cancun , Mexico .
 location contains: Mexico, Cancun
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:  Mexico, Cancun 
Answer:
 location contains: Mexico, Cancun