19040
 The Las Vegas real estate market has been soaring and the Tropicana casino , a relatively dowdy property , has one of the city 's most desirable locations , at Tropicana Avenue and the Las Vegas Strip . 
 location contains: Las Vegas, Las Vegas Strip
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
 Entity Pairs:  Las Vegas, Las Vegas Strip 
Answer:
 location contains: Las Vegas, Las Vegas Strip