4198
 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: 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} 
Answer:
 location contains: China, Shenzhen