14458
Nearly 10 million gallons a day draining away in the driest state in the nation -- and the fastest growing one , propelled by the demographic rocket of Las Vegas -- is just one of the many strange byproducts of Nevada 's tangled love affair with gold .
 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