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The bombings were the worst violence in more than a year in Iraq 's second largest city , and raised the prospect of sectarian violence on a scale that Basra has not seen before .
 location contains: Iraq, Basra
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:  Iraq, Basra 
Answer:
 location contains: Iraq, Basra