40015
A8 Shanghai 's Graying Population Shanghai , while known as youthful and vigorous , also has the oldest population in China , and it is getting older .
 China, Shanghai; China, Shanghai; China, Shanghai; Shanghai, China; China, Shanghai; Shanghai, China
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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:
 China, Shanghai; China, Shanghai; China, Shanghai; Shanghai, China; China, Shanghai; Shanghai, China