6076
School officials in Clark County , Nev. , the district that includes Las Vegas , had to call security to remove tutoring providers from a school where they were soliciting families too aggressively , the Center on Education Policy found in its report .
 location contains: Clark County, 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:  Clark County, Las Vegas 
Answer:
 location contains: Clark County, Las Vegas