6377
Looking around the world , at the US , Japan , Hong Kong , and even mainland China , there are countless examples of long - term downturns in the housing market .
 US, Japan, Hong Kong, China
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 US, Japan, Hong Kong, China