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Tens of thousands of residents lighted white candles at a vigil in one of Hong Kong 's largest urban parks on Saturday night to commemorate the 16th anniversary of the Tiananmen Square killings , the latest sign of the emotional hold the event still has here and in mainland China .
 Hong Kong, China; China, Hong Kong; China, Hong Kong
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:
 Hong Kong, China; China, Hong Kong; China, Hong Kong