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Hong Kong , a former British colony , returned to Chinese rule in 1997 .
 Hong Kong, a former British colony, British, Chinese
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 Hong Kong, a former British colony, British, Chinese