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Data on Nuclear Waste Site in Nevada Prove Elusive The Energy Department no longer has an estimate of when it can open the nuclear waste repository that it wants to build at Yucca Mountain , 90 miles northwest of Las Vegas , and it may never have an accurate prediction of the cost , the energy secretary said .
 location contains: Nevada, Las Vegas
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:  Nevada, Las Vegas 
Answer:
 location contains: Nevada, Las Vegas