15641
Yet a survey by the Chinese Academy of Social Sciences says that Shenzhen 's expanding middle class now accounts for about 10 percent of the city 's population of 12 million -- a higher percentage , most here believe , than in any other city in China , though reliable figures are hard to come by .
 location contains: China, Shenzhen
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "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} 
Answer:
 location contains: China, Shenzhen