3928
The mean and 95th percentile of inorganic arsenic exposures of the Hong Kong people were 0 . 22 and 0 . 38 mu g / kg body weight ( bw ) / day , respectively .
 Chemical: arsenic
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: arsenic