3419
BACKGROUND : Millions of individuals worldwide , particularly those living in rural and developing areas , are exposed to harmful levels of inorganic arsenic ( iAs ) in their drinking water .
 Chemical: inorganic arsenic; Chemical: iAs
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: inorganic arsenic; Chemical: iAs