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Cheung Siu Man , 40 , was arrested late on Wednesday after police searched a house and found heroin in bags and hidden in hollow spaces in wooden planks , police said .
 Cheung Siu Man
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 Cheung Siu Man