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Wai Ying constituency is loosely based on part of the Tsui Ping Estate in Kwun Tong with an estimated population of 19,656 .
 Kwun Tong
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kwun Tong